To J. W. Dawson   19 January 1872

My dear Sir

I am greatly indebted to your kindness for having sent me yr valuable memoir on the fossil plants of the Devonian & Upper-Silurian formations.¹ When we remember our state of knowledge only a few years ago, it is wonderful that a monograph sh^d have been published on the plants of these ancient formations.

With much respect | I remain dear Sir | yours faithfully | & obliged | Charles Darwin