Recent decades have witnessed a growing awareness of the need to study the impact of the New World on the Old, instead of the other way about. Yet surprisingly little is known about the whereabouts of books on America, or of atlasses and maps of this new world, in the libraries of European intellectuals from, say, 1500 until 1700 (the same holds true, incidentally, for texts about Asia). A possible explanation for this state of affairs might be that it is easier, although difficult enough, to compile a reliable bibliography of printed sources on America, as the splendid European Americana amply proves, than to ascertain what books figured in private libraries which are no longer intact. Furthermore, research into the private libraries of the past is still a somewhat modest sector of the province of intellectual history, in spite of the fact that Mario Schiff's brilliant study of the Marqués de Santillana's library dates from 1905 and that Henri-Jean Martin's seminal works have been published since 1958.