My dear Sir

I am much obliged for your letter & its enclosure.¹ Mr. Torbitt seems to be getting into an extensive and robust family of Tubers, and his expenses must be considerable. If he could only make the grand discovery of a disease proof variety his fortune would be in his hands. I need not say that insofar as our small contribution goes it is left entirely to your discretion as to disposal.²

In this part of the country³ the potato has not been so prolific as this year since the first appearance of disease in 1845. Before that time 10 tons an acre was a common crop,— five to 6 or 7—was the best since. But there are this season 10 & even 11 & 12 ton crops—with but a small proportion diseased. And I expect that the Irish general crop will be in something like the same proportion good.

I expect to return to town about the 25^th. inst.

Believe me My dear Sir | Yours very faithfully | James Caird

Charles Darwin Esq F.R.S.