personal sketch book of Wilhelm M Busch

This is a personal sketchbook by German artist Wilhelm M Busch. It is a clothbound hardback book with over 70 sketches. Most are of people with few trees, landscapes, houses, etc. One sketch looks to be Abraham Lincoln but I'm not sure. All appear to be original sketches. It was given as a gift in 1943 as evidenced by the inscription in the picture. All pages are intact and binding is tight on the book. The artists signature is on the front cover and appears to be in ink and the signature also appears on the inside top left corner of the first page. No tears or damage noted.