A selection of printed books mostly from the fifteenth and sixteenth centuries, the property of Mr. J.R. Ritman, sold for the benefit of the Bibliotheca Philosophica Hermetica, Amsterdam [other title:] Seventeenth to nineteenth centuries (catalogue of an auction conducted by Sotheby’s, London, 6 December 2000) § A second selection of printed books mostly from the fifteenth century, the property of Mr J.R. Ritman : sold for the benefit of the Bibliotheca Philosophica Hermetica (catalogue for an auction conducted by Sotheby's, London, 5 December 2001)