Butler wrote to Charles Darwin to explain what he meant by the "Book of the Machines": "I am sincerely sorry that some of the critics should have thought I was laughing at your theory, a thing which I never meant to do and should be shocked at having done." Soon after this Butler was invited to Down and paid two visits to Mr. Darwin there; he thus became acquainted with all the family and for some years was on intimate terms with Mr. (now Sir) Francis Darwin. It is easy to see by the light of subsequent events that we should probably have had something not unlike Erewhon sooner or later, even without the Russian lady and Sir F. N. Broome, to whose promptings, owing to a certain diffidence which never left him, he was perhaps inclined to attribute too much importance. But he would not have agreed with this view at the time; he looked upon himself as a painter and upon Erewhon as an interruption. It had come, like one of those creatures from the Land of the Unborn, pestering him and refusing to leave him at peace until he consented to give it bodily shape. It was only a little one, and he saw no likelihood of its having any successors. So he satisfied its demands and then, supposing that he had written himself out, looked forward to a future in which nothing should interfere with the painting. Nevertheless, when another of the unborn came teasing him he yielded to its importunities and allowed himself to become the author of The Fair Haven, which is his pamphlet on the Resurrection, enlarged and preceded by a realistic memoir of the pseudonymous author, John Pickard Owen. In the library of St. John's College, Cambridge, are two copies of the pamphlet with pages cut out; he used these pages in forming the MS. of The Fair Haven. To have published this book as by the author of Erewhon would have been to give away the irony and satire. And he had another reason for not disclosing his name; he remembered that as soon as curiosity about the authorship of Erewhon was satisfied, the weekly sales fell from fifty down to only two or three. But, as he always talked openly of whatever was in his mind, he soon let out the secret of the authorship of The Fair Haven, and it became advisable to put his name to a second edition.