In this 1948 letter, art critic and historian Wilhelm Reinhold Valentiner describes a painting depicted in one of the Contini photographs and attributes the work to Rembrandt van Rijn. This kind of correspondence was valuable to scholars as they grew in their understanding of the artwork and artists represented in collection. With the help of connoisseurs such as Valentiner, scholars working on the project were able to better differentiate original masterpieces from copies of the same work.