 It is unclear if Houbraken was informed first-hand by Willem Tomberg or took his information from Ignatius Walvis's "Description of Gouda", but he used him as a source for his biographies of the Gouda glass painters.Daniel Tomberg had been a pupil of Alexander Westerhout, the glass painter who studied under the father of Anthony van Dijk.According to the RKD he died in 1678.