| Description | "List of prices of buttons. Five cards." (Directed to 52 Pall Mall, London.)
Memorandum by Matthew Boulton. c. April 1799.
"My first calculation of Bath-metal buttons." (Compare the evidence given by Boulton to the Commons Committee, 13 April)
Memorandum by Matthew Boulton. c. April 1799.
"Calculations of the cost of Bath-metal and semelor buttons." |