Items

• [CJ409AAC], Letter from William Simpkin to Thomas Alva Edison, March 4th, 1907
  1907-03-04
• [CJ409AAF], Letter from William Simpkin to Thomas Alva Edison, November 28th, 1907
  1907-11-28
• [CJ409AAG], Letter from William Simpkin to Thomas Alva Edison, December 7th, 1907
  1907-12-07
• [CJ416AAN], Letter from William Simpkin to Herschel Roberts, January 29th, 1902
  1902-01-29
• [CJ417AAA1], Letter from William Simpkin to Thomas Alva Edison, February 26th, 1903
  1903-02-26
• [CJ417AAB], Letter from William Simpkin to Walter Seeley Mallory, March 16th, 1903
  1903-03-16
• [CJ418AAC], Letter from William Simpkin to Dunderland Iron Ore Co Ltd, April 6th, 1904
  1904-04-06
• [CJ420AAF], Letter from William Simpkin to Stephen Hungerford Pollen, April 14th, 1906
  1906-04-14
• [CJ420AAI], Letter from William Simpkin to Stephen Hungerford Pollen, April 18th, 1906
  1906-04-18
• [CJ420AAK], Letter from William Simpkin to Stephen Hungerford Pollen, April 18th, 1906
  1906-04-18
• [CJ420ABH], Letter from William Simpkin to Thomas Alva Edison, October 20th, 1906
  1906-10-20
• [CJ420ABJ], Letter from William Simpkin to Thomas Alva Edison, October 31st, 1906
  1906-10-31
• [CJ420ABL], Letter from William Simpkin to Thomas Alva Edison, November 30th, 1906
  1906-11-30
• [CJ420ABN], Letter from William Simpkin to Thomas Alva Edison, December 15th, 1906
  1906-12-15
• [CJ421AAB], Letter from William Simpkin to Stephen Hungerford Pollen, January 25th, 1907
  1907-01-25
• [CJ421AAC], Letter from William Simpkin to Thomas Alva Edison, January 30th, 1907
  1907-01-30
• [CJ421AAC1] Technical Note, January 29th, 1907
  1907-01-29
• [CJ421AAK], Letter from William Simpkin to Thomas Alva Edison, December 30th, 1907
  1907-12-30
• [CJ429AAB], Letter from William Simpkin to Thomas Alva Edison, July 24th, 1902
  1902-07-24
• [CJ429AAC], Letter from William Simpkin to Thomas Alva Edison, July 31st, 1902
  1902-07-31
• [CJ429AAD], Letter from William Simpkin to Herman Ernest Dick, August 1st, 1902
  1902-08-01
• [CJ429AAE], Letter from William Simpkin to Walter Seeley Mallory, August 5th, 1902
  1902-08-05
• [CJ429AAF], Letter from William Simpkin to Thomas Alva Edison, August 7th, 1902
  1902-08-07
• [CJ429AAF1], Technical Note, William Simpkin, August 6th, 1902
  1902-08-06
• [CJ429AAG], Letter from William Simpkin to Thomas Alva Edison, August 11th, 1902
  1902-08-11
• [CJ429AAG1], Technical Note, William Simpkin, August 11th, 1902
  1902-08-11
• [CJ429AAH], Letter from William Simpkin to Thomas Alva Edison, August 15th, 1902
  1902-08-15
• [CJ429AAI], Letter from William Simpkin to Thomas Alva Edison, August 19th, 1902
  1902-08-19
• [CJ429AAJ], Letter from William Simpkin to Thomas Alva Edison, August 21st, 1902
  1902-08-21
• [CJ429AAK], Letter from William Simpkin to Thomas Alva Edison, August 22nd, 1902
  1902-08-22
• [CJ429AAL], Letter from William Simpkin to Thomas Alva Edison, August 23rd, 1902
  1902-08-23
• [CJ429AAM], Letter from William Simpkin to Thomas Alva Edison, August 26th, 1902
  1902-08-26
• [CJ429BAA], Letter from William Simpkin to Thomas Alva Edison, September 1st, 1902
  1902-09-01
• [CJ429BAB], Letter from William Simpkin to Thomas Alva Edison, September 2nd, 1902
  1902-09-02
• [CJ429BAB1], Technical Note, William Simpkin, September 2nd, 1902
  1902-09-02
• [CJ429BAG], Letter from William Simpkin to Thomas Alva Edison, September 5th, 1902
  1902-09-05
• [CJ429BAM], Letter from William Simpkin to Thomas Alva Edison, September 9th, 1902
  1902-09-09
• [CJ429BAN], Letter from William Simpkin to Thomas Alva Edison, September 11th, 1902
  1902-09-11
• [CJ429BAO1], Letter from William Simpkin to Thomas Alva Edison, September 12th, 1902
  1902-09-12
• [CJ429BAP], Letter from William Simpkin to Thomas Alva Edison, September 15th, 1902
  1902-09-15
• [CJ429BAR], Letter from William Simpkin to Thomas Alva Edison, September 19th, 1902
  1902-09-19
• [CJ429BAT], Letter from William Simpkin to Thomas Alva Edison, September 23rd, 1902
  1902-09-23
• [CJ429BAU], Letter from William Simpkin to Thomas Alva Edison, September 26th, 1902
  1902-09-26
• [CJ429CAB], Letter from William Simpkin to Thomas Alva Edison, October 4th, 1902
  1902-10-04
• [CJ429CAC], Letter from William Simpkin to Thomas Alva Edison, October 10th, 1902
  1902-10-10
• [CJ429CAE], Letter from William Simpkin to Thomas Alva Edison, October 14th, 1902
  1902-10-14
• [CJ429CAF], Letter from William Simpkin to Thomas Alva Edison, October 15th, 1902
  1902-10-15
• [CJ429CAG], Letter from William Simpkin to Thomas Alva Edison, October 17th, 1902
  1902-10-17
• [CJ429CAH], Letter from William Simpkin to Thomas Alva Edison, October 28th, 1902
  1902-10-28
• [CJ429CAI], Letter from William Simpkin to Thomas Alva Edison, October 28th, 1902
  1902-10-28
• [CJ429CAK], Letter from William Simpkin to Thomas Alva Edison, November 4th, 1902
  1902-11-04
• [CJ429CAN], Letter from William Simpkin to Thomas Alva Edison, November 11th, 1902
  1902-11-11
• [CJ429CAP], Letter from William Simpkin to Thomas Alva Edison, November 12th, 1902
  1902-11-12
• [CJ429CAQ], Letter from William Simpkin to Thomas Alva Edison, November 18th, 1902
  1902-11-18
• [CJ429CAT], Letter from William Simpkin to Thomas Alva Edison, December 3rd, 1902
  1902-12-03
• [CJ429CAU], Letter from William Simpkin to Thomas Alva Edison, December 9th, 1902
  1902-12-09
• [CJ429CAV], Letter from William Simpkin to Thomas Alva Edison, December 12th, 1902
  1902-12-12
• [CJ429CAW], Letter from William Simpkin to Herman Ernest Dick, December 15th, 1902
  1902-12-15
• [CJ429CAX], Letter from William Simpkin to Thomas Alva Edison, December 19th, 1902
  1902-12-19
• [CJ429CAY], Letter from William Simpkin to Herman Ernest Dick, December 22nd, 1902
  1902-12-22
• [CJ432AAA], Letter from William Simpkin to Thomas Alva Edison, January 2nd, 1903
  1903-01-02
• [CJ432AAB], Letter from William Simpkin to Herman Ernest Dick, January 9th, 1903
  1903-01-09
• [CJ432AAC], Letter from William Simpkin to Herman Ernest Dick, January 20th, 1903
  1903-01-20
• [CJ432AAD], Letter from William Simpkin to Herman Ernest Dick, January 23rd, 1903
  1903-01-23
• [CJ432AAF], Letter from William Simpkin to Thomas Alva Edison, April 7th, 1903
  1903-04-07
• [CJ432AAG], Letter from William Simpkin to Thomas Alva Edison, April 8th, 1903
  1903-04-08
• [CJ432AAH], Letter from William Simpkin to Thomas Alva Edison, April 9th, 1903
  1903-04-09
• [CJ432AAJ], Letter from William Simpkin to Thomas Alva Edison, April 22nd, 1903
  1903-04-22
• [CJ432AAN], Letter from William Simpkin to Thomas Alva Edison, May 2nd, 1903
  1903-05-02
• [CJ432AAO], Letter from William Simpkin to Thomas Alva Edison, May 5th, 1903
  1903-05-05
• [CJ432AAT], Letter from William Simpkin to Thomas Alva Edison, May 19th, 1903
  1903-05-19
• [CJ432AAV], Letter from William Simpkin to Thomas Alva Edison, May 20th, 1903
  1903-05-20
• [CJ432AAW], Letter from William Simpkin to Thomas Alva Edison, May 22nd, 1903
  1903-05-22
• [CJ432CAA], Letter from William Simpkin to Thomas Alva Edison, September 4th, 1903
  1903-09-04
• [CJ432CAB], Letter from William Simpkin to John F Randolph, September 8th, 1903
  1903-09-08
• [CJ432CAC], Letter from William Simpkin to Thomas Alva Edison, September 8th, 1903
  1903-09-08
• [CJ432CAD], Letter from William Simpkin to Thomas Alva Edison, September 8th, 1903
  1903-09-08
• [CJ432CAE], Letter from William Simpkin to Thomas Alva Edison, September 8th, 1903
  1903-09-08
• [CJ432CAG], Letter from William Simpkin to Thomas Alva Edison, September 8th, 1903
  1903-09-08
• [CJ432CAK], Letter from William Simpkin to Dunderland Iron Ore Co Ltd, August 31st, 1903
  1903-08-31
• [CJ432CAM], Letter from William Simpkin to Thomas Alva Edison, September 8th, 1903
  1903-09-08
• [CJ432CAN], Letter from William Simpkin to Thomas Alva Edison, September 26th, 1903
  1903-09-26
• [CJ432CAO], Letter from William Simpkin to Thomas Alva Edison, September 28th, 1903
  1903-09-28
• [CJ432CAQ], Letter from William Simpkin to Thomas Alva Edison, September 30th, 1903
  1903-09-30
• [CJ432CAT], Letter from William Simpkin to Thomas Alva Edison, October 14th, 1903
  1903-10-14
• [CJ432CAU], Letter from William Simpkin to Thomas Alva Edison, October 15th, 1903
  1903-10-15
• [CJ432CAV], Letter from William Simpkin to Thomas Alva Edison, October 17th, 1903
  1903-10-17
• [CJ432CAW], Letter from William Simpkin to Thomas Alva Edison, October 28th, 1903
  1903-10-28
• [CJ432CAX], Letter from William Simpkin to Thomas Alva Edison, October 31st, 1903
  1903-10-31
• [CJ432CAY], Letter from William Simpkin to Thomas Alva Edison, November 7th, 1903
  1903-11-07
• [CJ432CBJ], Letter from William Simpkin to Thomas Alva Edison, December 31st, 1903
  1903-12-31
• [CJ438001], Cost Estimate, William Simpkin, November 1st, 1901
  1901-11-01
• [CJ438006], Cost Estimate, William Simpkin, December 28th, 1901
  1901-12-28
• [CJ438032], Letter from William Simpkin to Thomas Alva Edison, December 28th, 1901
  1901-12-28
• [CJ438033], Cost Estimate, William Simpkin, December 28th, 1901
  1901-12-28
• [CJ438058], Cost Estimate, William Simpkin, December 30th, 1901
  1901-12-30
• [CJ438060], Letter from William Simpkin to Thomas Alva Edison, December 31st, 1901
  1901-12-31
• [CJ438061], Cost Estimate, William Simpkin, December 31st, 1901
  1901-12-31
• [CJ602AAF], Letter from William Simpkin to Walter Seeley Mallory, December 19th, 1900
  1900-12-19
• [CJ604AAQ], Cost Estimate, William Simpkin, Edison Portland Cement Co, 1901
  1901-00-00