In about 1919, Leech was commissioned by a London solicitor Percy Dumville Botterell (1880–1950), to paint a portrait of his wife May née Pearson (1881–1965). Leech painted a sharp black-and-white portrait of May titled
Dame en noir, followed by
Portrait bleu, which won a bronze medal at the 1922 Paris Salon. May quickly became Leech's lover and model, which finally ended his relationship with Elizabeth. May used a family allowance to move to a house in London near Leech, however they kept the relationship private, and only married in 1953 after the deaths of both Elizabeth and of Percy. Leech and Botterwell travelled frequently together and particularly to the south of France and
Nice, where Leech continued to paint. Return trips to Concarneau were made, often with his friend Thompson, and Leech also painted female nudes in watercolours with Botterell as subject. In 1925-26, Leech made his first and only sculpture, a bronze casting of May's head. By the late 1930s, a lack of sales and money, amplified by the privacy under which Leech and Botterell were living, forced Leech to remain in England, painting landscapes in Devon and Kent and scenes in London. A series of major exhibitions in Dublin in 1945, 1947 and 1951, organised by Leo Smith in the
Dawson Street Gallery revived interest in Leech's works and his energy and enthusiasm for painting. In 1958, Leech and May moved to the Tudor-style Candy Cottage in
West Clandon in Surrey, where Leech continued to work. In 1965, May died of
bronchial pneumonia which drove Leech into a depression. In July 1968, Leech was badly injured from a fall in a possible
suicide attempt on West Clandon railway bridge, but Leech succumbed to his injuries shortly after. ==Legacy==