p. 54 and 55

[Left Page]

...continued my walk to the upper end where I found some shells in on the mud in the canal just below the surface of the water. I brought home some of them alive and put them in a tin cup of water which I boiled. The animal was then taken from the shell with a pin bent in the form of hook. There are however some species of helix which cannot be got from their shell in this way as they immediately draw themselves so far into the...

[Right Page]

...shell on being touched that cannot be reached with the hook.
Fryday March 27th
I worked all this forenoon on the canal measuring the rock now remaining in it at the lower end which is to be excavated by P.J. Baldwin in the afternoon - Mr. Henry went to Louisville to carry the estimates and I spent the time in my room making the calculations of the rock measured in the forenoon.