Pen and ink drawings of three varieties of citrus, labelled A, B, C. Each variety is shown with the full fruit and a corresponding cross section. Citrus referred to in 'Hesperides sive de malorvm avreorvm cvltvra et vsv libri quatuor' by Giovanni Baptista Ferrari, published in Rome in 1646, traced by Jean Verbrugge. The page numbers alongside each illustration are those on which the illustrations appear in the published work