Unknown artist

This drawing was thought to be by Ludolf Backhuysen when it was purchased in 1960, but when compared to the Backhuysen "Smalschip Recaulking on the Dutch Dunes", this attribution proved to be suspect. Backhuysen's drawings consistently have a light graphite outline beneath the ink. Moreover, the drawing technique lacks the assurance of Backhuysen's hand. The team's suspicions were confirmed when the drawing was held before a light. This should have revealed the mold lines of a handmade paper. There were none, indicating that the paper was machine manufactured, a process used after 1801.