... have, however, bought none but by the advice and in the presence of Mr. Ruelens in Brussels, of whom I wrote you amply, and in the presence of Dr. Karl Brandes, Custos of the library here, who, like Mr. Ruelens , buys books for his library all over Europe . . . . . I am now in Berlin for the second time, on the affairs of the Library, and the purchases I have made here are, I think, quite as good as those I ...