Album amicorum aangeboden aan A.L.G. Bosboom-Toussaint, bijdrage van Koster, B.

An album amicorum, also known as a "friendship album," is a type of book that was popular in the 16th and 17th centuries, in which people would record their personal thoughts and experiences, as well as the names and contact information of their friends and acquaintances. These albums were often kept as keepsakes and were used as a way to stay in touch with friends and to record memories of important events and experiences.