Kay Neilsen's unique, stylised illustrations enjoyed a great revival in the 1970s thanks to being published as art postcards. In fact they also did much to help create the boom in such cards and posters that followed. Personally I always thought it a shame he more or less abandoned illustration to design Hollywood film sets, but no doubt he had his reasons. Below are some of his pictures from East of the Sun and West of the Moon, a classic collection of Norwegian folk tales. Neilsen's genius was to blend their mood with Japanese graphic style. An artist I've only recently come across and who was obviously much influenced by Neilson is Virginia Frances Sterrett. Here's a selection of her illustrations for the Arabian Nights. Another great graphic artist who enjoyed a revival in the 1970s was Alphonse Mucha whose posters were probably second only to Aubrey Beardsley's in popularity on student bedsit walls. Jan Toorop is less well known but his pictures appeal to me for similar reasons to the other two for visual reasons, being very graphic, but are more inclined towards Symbolism.