 He collaborated in the early 1840s with the famous astronomer, John Frederick William Herschel.He may have associated with the artist Thomas Sully and his wife.Besides being close to the Hayter family, who were already established artists, Henry and Ellen were also close friends of Edwin Landseer, the well-known painter of animals and pastoral English landscapes as well as the designer of the four bronze lions at the base of Nelson's Column in Trafalgar Square, London.