Pencil drawing, 28 x 38 cm, lo. le. sign. a. dat. J. Alt 1825, min. foxing, framed under glass, uninspected out of frame. - Landscape painter, watercolour painter a. graphic artist, father of the well-known Vienna artist's family. A. studied at the Vienna academy, painted views on the Alps a. the Danube, Italy a. Rome. - Lit.: Boetticher, Thieme-Becker, Bénézit a. others.