A small collection of six silver reference books

A small collection of six silver reference books,

comprising: Jackson, C., An Illustrated History of English Plate, Batsford, 1911, Volume 1 and 2, half leather bound, plus Catalogue of Plate Belonging to The Duke of Portland, Alfred Jones, 1935, The London Goldsmiths, 1200-1800, Ambrose Heal, Paul Storr by N. Penzer and Old English Gold Plate, by E. Alfred Jones, 1907. (6)