(Bertram Charles Percival, 1883-1972, Portrait Photographer
Portrait Photograph signed in pencil on the mount, of an unnamed sitter
showing the sitter head and shoulders in profile, wearing a coat with a fur lined collar and pearls, 12 x 10 in mount 18 x 13½, with photographer's label on verso, 45 Dover Street, Piccadilly, no date
Park's work included British and European royalty. Engravings of his photographs were widely used on British and British Commonwealth postage stamps, currency, and other official documents in the 1930s. His theatrical portraits were the source for two paintings by Walter Sickert.