1From James Madison to Landon Carter, 24 February 1810 (Madison Papers)
I have duly recd. your letter of the 19th. on the subject of a newly invented Lock. From the description of it, it would seem to be a useful subs[t]itute for the common locks. Its value however necessarily depends on so many circumstances which influence a general preference, in such cases, & which are so well understood by yourself, that with your better knowledge of the merits of your...