My dear Sir

Your letter has been forwarded to me here, where I am staying for a week to see my Father.— I am in truth really obliged to you for your kind offer of experimentising on hybrids in the ensuing year.

I hope you will record all facts, such as the number of plants you experimentise on, their names &c &c.— Of course when I publish, your experiments will be given with your name.— Negative facts (ie failures) are as important to know as successes.—

I have this day written to my Publisher to send you a copy of my Journal³ by the first opportunity. It gives me real pleasure to show you this very small mark of my thankfulness

Pray believe me | In Haste | Yours faithfully | C. Darwin

The copy I send is the second Edition, & is I hope somewhat improved, from the 1^st. that was published.