A related painting is in Munich, inv. #830, signed and dated 1608: same landscape, different figures. On panel but very similar in size. Might have been done in studio concurrently with this one, or left unfinished and completed later by Jan the Younger. Ertz attributes it to Jan the Younger. Another pretty close variant was sold at Dorotheum, Vienna, December 1 1970 (panel, 29 x 43) -- again similar in size but on panel.