My dear M^rs Marsh Caldwell

Your very kind note has pleased me much. I sh^d. have answered it sooner, but there has been some delay, owing to our return yesterday from London, where we have been staying with Erasmus, who is only very moderately well.²

I am ashamed to say that I forgot the Christian name of M^r Corbet;³ nor do I know his address; so will you be so kind as to direct the enclosed note for him.⁴

I have given him all the information which I could, but it is worse than useless to try by mere chance experiments in diet.—⁵

Emma has brought back a cold from London & is in bed, other wise she would have written & sent a note better worth receiving than this.

Pray believe me, my dear M^rs. Marsh Caldwell | Yours very sincerely | Ch. Darwin