Philada. Decr. 5. 1806
I beg leave to inclose a letter addressed to Dr Goforth, & to request that you would be pleased to direct it, & send it to the Post Office. We Cannot ascertain his residence with Certainty, as he formerly lived at Washington Kentucky, but has removed to Cincinnati, or some place in its vicinity, as you Can probably procure the necessary information, from some of the Members of Congress, we beg this additional favour of you. Mr. Danl. Clarke now at Washington City Confirms the accounts of the Surprizing Magnitude of the foot with claws—if I do not mistake, he supposed it was 4½ feet broad. The paragraph in the Baltimore Paper attracted attention, & Mr Peale wrote to the Printer soon after its appearance, but received no answer—Dr Buchanan, late of Baltimore, also made several inquiries on the subject but he could learn nothing.
The small head sent by Col. Stewart arrived safe, I believe it belonged to a Squirrel, & suppose it will form a distinct species, hitherto unknown to naturalists, this inference is suggested by its size, as well as its teeth, but I have not decided fully on this part of the subject, for we have no specimens here of the large Squirrels which are mentioned by naturalists, & the size of the teeth alone is not sufficient to decide upon, as in some of the Rodentia or Glires, the teeth have been observed to increase greatly in length, when they were domesticated; not withstanding this, I believe we shall have a Squirrel to be named from his large teeth. Permit me to offer you my most Cordial & Sincere Congratulations on the return of Captains Lewis & Clarke, we have experienced here the most anxious solicitude respecting them, & the greatest Curiosity as to their discoveries—May we beg you to specify (if you think it proper) in your next letter to any of the Society, the general Course of the Missouri, or the latitude & longitude of the falls—If at the same time you can spare another minute to say where the Squirrels head was found it will also greatly oblige
your affectionate friend
C. Wistar Junr.
DLC: Papers of Thomas Jefferson.