A PAIR OF CASTELLI DATED RECTANGULAR PLAQUES painted by Saverio Grue, one with a cowherd with a donkey and a goat beside a gatehouse on a river estuary flanked by ruined buildings, the other with travellers on horseback in a similar wooded river landscape, both with rocks in the foreground, the first signed S.G.P. 1749, the second signed S.G. and 1748(?) (edges very slightly trimmed, chipping to underside, the second with a minute rim chip to the left edge) 1749