Towards the end of May 1905, Potter sent the illustrations to Warne for his review, writing, "I think it promises to make a pretty book." He criticised a picture of the cat and Potter wrote him, "If you still feel doubtful about the little cat—will you post it back to me at once ... I don't feel perfectly satisfied with the eyes of the large head, but I think I can get it right, by taking out the lights carefully, if you will ask Hentschel not to do it before we have proofs. The drawing is getting much too rubbed."