My dear Waterhouse

Many thanks for the enclosed interesting letter.—² It always pleases me to see a clear-headed man on my side, & especially if he be bold enough to speak out, & thus render really efficient aid.— For it will require much speaking out before this side will receive fair toleration.—

M^r. Walsh has evidently been a close & good observer of Fishes.—³ What he says about the Sea-Trout in the Loch is very curious; & it would be very desirable that some professed Ichthyologist should examine these Trout.— It would make a good case for me.— But until thus examined & pronounced on, cavillers would simply deny that the fish was a sea-trout.—

I hope to see you before long, for I shall be up on the 21^st to read a paper at Linn. Soc.—⁴

Did you ever look at the skull of the Borneo Domestic Cat, which I gave you?—⁵

My dear Waterhouse | Yours very sincerely | Charles Darwin