The color yellow indicates documents held in other manuscript collections at the MHS, public and private repositories, or the collections of private owners.
Pleads for raising the duty on pianofortes to 35%. The letter to Webster forwarding a copy of Mackay's letter to JQA pleads for Webster's support for the same purpose in the Senate. (JQA was appointed to House Committee on Manufactures, 8 Dec. 1831.)