The businessman and collector David Henriques de Castro (1826-1898) in about 1865, seen in a portrait by his brother, the artist Gabriel (1838-1897). David was a man of substance and active on the boards of the synagogue and the Jewish school for poor children. In addition he researched Bet Haim, the cemetery of the Portuguese Jews of Amsterdam and he described 6000 gravestones. He wrote at least two books: "Keur van grafsteenen op de Nederl.-Portug.-Israe͏̈l. begraafplaats te Ouderkerk aan den Amstel" and "De Synagoge der Portugeesch-Israelietische Gemeente te Amsterdam : 1675 - 1875", both in Dutch. His publications and the catalogue of his collection can be found on the site Judaica of the Goethe University of Frankfurt.http://sammlungen.ub.uni-frankfurt.de/freimann/content/titleinfo/685503http://sammlungen.ub.uni-frankfurt.de/freimann/content/titleinfo/984296http://sammlungen.ub.uni-frankfurt.de/freimann/content/titleinfo/1361218His grave, of course, is also to be found in Beth Haim.