Mr.Darwin seems to have read Murray's views only in a separate copy reprinted from the "Proc.

R.Soc.

Edin." There is some confusion about the date of the paper; the separate copy is dated January 16th, while in the volume of the "Proc.

R.Soc." it is February 20th.

In the "Life and Letters," II., page 261 it is erroneously stated that these are two different papers.); but it can, I think, be fairly answered.
LETTER 93.