My dear D^r. Günther

I am very much obliged to you. The sight of the proofs has pleased me more than anything which has happened to me for some weeks.¹ Pray tell M^r Ford² (or show him this note) that I am delighted with their appearance. I hope you are pleased with them, for they all illustrate facts which I give wholly on your authority. I declare I think the sexual differences in the Chæmelions look more wonderful in the figures than in the real specimens.³ They will make my chapter capital. Pray tell M^r Ford that I am excessively pleased, also, with the feathers, which look far better than I thought possible.⁴ I long to see those of the Argus Pheasant & Peacock—⁵ There ought to be a drawing of the head of female salmon.—⁶

Accept my cordial thanks for all your extraordinary kindness

Yours very sincerely | Ch. Darwin

The Callionymus also is beautiful.— I lately saw some one who said he did not believe fishes ever differed much sexually!⁷