[10] In April 1881, Clark was living with his parents, three brothers, and two sisters in Market Square, Cerne Abbas, and stated his occupation for that year's census as "Artist (Fine Arts)".
[7] In July 1879, his etching of a work of George Frederic Watts, "The Three Goddesses", was reviewed favourably in The Spectator,[13] and the next year under the title "Pallas, Juno, & Venus" was printed in Paris in L'Art.
[18] In 1895, Clark worked with Strang again to illustrate The Surprising Adventures of Baron Munchausen[19] and Sindbad the Sailor and Alibaba and the Forty Thieves,[20] an edition which has been called reminiscent of the structure of Chinese boxes.
[22] At the time of the census of 1911, Clark was living alone at 19, King Henry's Road, and was Curator of the Schools at the Royal Academy of Arts, Burlington House.
[25][26] He left property valued at £5,916, equivalent to £477,140 in 2023, and probate was granted to John Henry Clark, draper, and Charles Frederick Fox FSA.
[30] Five of his illustrations for The Surprising Adventures of Baron Munchausen, drawn in Indian ink, are in the Prints and Drawings Study Room of the Victoria and Albert Museum.