Horace Wilkinson (1866-1957) studies at Brighton School of Art and South Kensington School of Art. Between 1886 and 1901 he worked with Arthur J Dix, Gibbs & Howard, Edward Frampton, Burlison & Grylls, Clayton & Bell and Drake of Exeter. He worked independently from 1901 to 1945. He was joined by his son, Arthur L Wilkinson, from 1920-1939.
Source: Stained Glass Marks & Monograms, complied by Joyce Little, and edited by Angela Goedicke & Margaret Washbourn (NADFAS, 2002)