Butler also studied art at South Kensington, but by 1867 he had begun to go to Heatherley's School of Art in Newman Street, where he continued going for many years. He made a number of friends at Heatherley's, and among them Miss Eliza Mary Anne Savage. There also he first met Charles Gogin, who, in 1896, painted the portrait of Butler which is now in the National Portrait Gallery. He described himself as an artist in the Post Office Directory, and between 1868 and 1876 exhibited at the Royal Academy about a dozen pictures, of which the most important was "Mr. Heatherley's Holiday," hung on the line in 1874. He left it by his will to his college friend Jason Smith, whose representatives, after his death, in 1910, gave it to the nation and it is now in the National Gallery of British Art. Mr. Heatherley never went away for a holiday; he once had to go out of town on business and did not return till the next day; one of the students asked him how he had got on, saying no doubt he had enjoyed the change and that he must have found it refreshing to sleep for once out of London. "No," said Heatherley, "I did not like it. Country air has no body." The consequence was that, whenever there was a holiday and the school was shut, Heatherley employed the time in mending the skeleton; Butler's picture represents him so engaged in a corner of the studio. In this way he got his model for nothing. Sometimes he hung up a looking-glass near one of his windows and painted his own portrait. Many of these he painted out, but after his death we found a little store of them in his rooms, some of the early ones very curious. Of the best of them one is now at Canterbury, New Zealand, one at St. John's College, Cambridge, and one at the Schools, Shrewsbury. This is Butler's own account of himself, taken from a letter to Sir Julius von Haast; although written in 1865 it is true of his mode of life for many years: I have been taking lessons in painting ever since I arrived, I was always very fond of it and mean to stick to it; it suits me and I am not without hopes that I shall do well at it. I live almost the life of a recluse, seeing very few people and going nowhere that I can help--I mean in the way of parties and so forth; if my friends had their way they would fritter away my time without any remorse; but I made a regular stand against it from the beginning and so, having my time pretty much in my own hands, work hard; I find, as I am sure you must find, that it is next to impossible to combine what is commonly called society and work.