Man at an altar in a landscape Title page for: JE Blum, Tugend-schule der Natur, 1666, Between two hermans with wings a look at a man at an altar in a landscape, his arm raised to some birds. Above the title on a canvas, held by two birds with the tetragram above it. At the bottom the portrait of Johannes Erasmus Blum held in an oval by two kneeling putti. Below two lines in German, birds, pedestal or a piece of sculpture (perhaps in the form of a herm), angels, Johannes Erasmus Blum, Christiaan Hagen (mentioned on object), Amsterdam, paper, engraving, h 128 mm × w 70 mm