The Virgin reading

Comparable to a series of small studies of the Virgin Annunciate, illustrated in A. Morassi, Guardi, I Disegni, Venice, 1984, nos. 130-3, figs. 132-5, for the drawings, and for the paintings, A. Morassi, Guardi, I Dipinti, Venice, 1973, nos. 187-190, figs. 207-10.