Classical landscape with figures

Classical landscape with figures; foreground, on the left, a small tree, in the centre, a semi-nude figure holding a lyre? seated in a crevice underneath a small rocky hill, on the right, a tree; middleground, on the left, a reclining male figure, on the right, boats on, and figures standing by, a lake; background, on the left, hills and a distant building, on the right, mountains and a hilltop castle. Drawn in a fluid, sketchy line in pen and ink with some cross hatching. Central vertical crease. Staining and water damage on left margin