[The following pocket notebook was discovered after the microfilm edition of Thomas A. Edison Papers, Part I (1850-1878) was published and was initially published in the Supplement Series in the microfilm edition of Thomas A. Edison Papers, Part III (1887-1898). To see the location of this item in the Series Notes for Part I, use the "Which Series Notes?" button.]

This undated pocket notebook is one of three books that Edison took with him to England in the spring of 1873. The entries deal primarily with proposed experiments on cable and automatic telegraphs, which Edison planned to try upon his return to the United States. The cover is missing and several pages appear to have been removed from the book.