416 pp. with 414 monochrome plates. The book was edited and prepared for publication by Bowron from Clark's research and papers following his death in 1976. A second edition by Bowron was published in two volumes in 2016 by Yale University Press in association with the Museum of Fine Arts, Houston and the Paul Mellon Centre for Studies in British Art, London. Six entries catalogue Batoni's portraits of patrons of Wilson in Italy:
Joseph Henry [Henry] (cat. 147);
Stephen Beckingham [Beckingham] (cat. 164);
Ralph Howard, Viscount Wicklow [Howard, Ralph] (cat. 165);
Henry, 10th Earl of Pembroke [Pembroke] (cat. 175);
Sackville Tufton, 8th Earl of Thanet [Thanet] (cat. 177);
William Legge, 2nd Earl of Dartmouth [Dartmouth] (cat. 195)
