This section of the OUTGOING CORRESPONDENCE consists of letterbooks created by Singer employees which did not fit into the other series of outgoing correspondence. These volumes are arranged alphabetically by employee name.

Perhaps the most important are the travelling letterbooks of John Mitchell, the head of Singer's London office. These volumes consist of letters written while on inspection trips in Brussels, Paris, Madrid, Lyon, etc. Also notable is a volume which includes 1851 correspondence of Singer's little-known New York partner (Barzillan Ransom) and 1853-1854 correspondence of two employees (Richard and Burgess), whose precise positions within the company are not clear. This volume was greatly deteriorated due to water damage, and it was difficult to microfilm satisfactorily. Because of the rarity of correspondence from this period in company history this volume was not destroyed after filming. Also grouped here is a book of letters (1874-1878) of George E. Bacon sent to agents regarding discrepancies in sales, suggestions for better results, and general advice on improved management, and a letterbook of C.S. Groesbeck, another New York clerk. (The Bacon volume is similar to material in the INCOMING CORRESPONDENCE.)