Aa notary in Delft, and was also an important person for the arts in Delft. He also practiced poetry and calligraphy (Wikipedia in Dutch), which probably explains the quills, book and ink. De Langue moved in artistic circles and dealt with Vermeer. His name is often mentioned in the Delft housing register, including an important building on the east side of Oude Delft, number 202. He was buried from Brabantse Turfmarkt. (https://kalden.home.xs4all.nl/dart/d-a-vliet-ww.htm)