James Elliot Cabot writes to Thoreau:
I carried them to Mr. Agassiz, who was highly delighted with them [, and began immediately to spread them out and arrange them for his draughtsman. Some of the species he had seen before, but never in so fresh condition; others, as the breams and the pout, he had seen only in spirits, and the little tortoise he knew only from the books. I am sure you would have felt fully repaid for your trouble, if you could have seen the eager satisfaction with which he surveyed each fin and scale.] He said the small mud-turtle was really a very rare species, quite distinct from the snapping-turtle. The breams and pout seemed to please the Professor very much. [Of the perch Agassiz remarked that it was almost identical with that of Europe, but distinguishable, on close examination, by the tubercles on the sub-operculum . . . More of the painted tortoises would be acceptable. The snapping turtles are very interesting to him as forming a transition from the turtles proper to the alligator and crocodile . . . We have received three boxes from you since the first.] He would gladly come up to Concord to make a spearing excursion, as you suggested, but is drawn off by numerous and pressing engagements.
Thoreau replies on 8 May.