ITALIAN SCHOOL, 17TH CENTURY

ITALIAN SCHOOL, 17TH CENTURY
A rocky landscape with a castle on the left (recto); Geometrical studies (verso)
signed with initials ‘S.N.’ (lower right); ); with numbers and letters and inscription ‘Gradi’ (verso)
pen and brown ink
5 ¼ x 8 1/8 in. (13.2 x 20.07 cm)