Landscape with trees.

Drawing, pen and two shades of brown ink, traces of graphite pencil, brown ink framing lines, 16,1 x 20,6 cm, laid paper, unsigned (frayed at upper right corner with sl. loss of image, sl. toned paper, sm. worm hole at lower right center, old repairs on verso of upper and lower left corners, otherwise good condition).

This drawing can be attributed with some confidence to Adriaen Verboom (1628-1670), not only on stylistic grounds, but also because its composition is similar to attributed drawings by Verboom in the Pushkin Museum (inv. 1101) and a recently acquired drawing in the Teylers Museum (inv. KT 2014 038). The sheet could also be by Claes van Berensteyn (1617-1684), who also worked in Haarlem at the same time, and who had a similary minutely drawing style with identical tree branches.
Ref. https://rkd.nl/explore/artists/80086. - S. Hautekeete, "Dessins du Siècle d'or hollandais. La Collection Jean de Grez", Brussels 2007, no 37.