The Legatum Warnerianum of Leiden University Library, by G. W. J. Drewes.--Warner's manuscripts and books in the main printed catalogues, by P. Sj. van Koningsveld.--Catalogue of the exhibition by I. Acker-Van Eyk, J. T. P. de Bruijn, A. J. W. Huisman and P. Sj. van Koningsveld.