Dear Sir

I thank you cordially for the continuation of your fine work on the Tyrolese Dolomites with its striking engravings & the maps which are quite wonderful from the amount of labour which they exhibit, & its extreme difficulty—¹ I well remember more than 40 years ago examining a Section of Silurian limestone containing many corals, & thinking to myself that it would be for ever impossible to discover whether the ancient corals had formed atolls or barrier reefs; so you may well believe that your work will interest me greatly as soon as I can find time to read it.—² I am much obliged for your photograph & from its appearance, rejoice to see that much more good work may be expected from you—

I enclose my own photograph in case you should like to possess a copy—

Believe me dear Sir. | Yours faithfully & obliged | Charles Darwin.