- Catalogue of the Collection of Jewels and Precious Works of Art, the Property of J. Pierpont Morgan / compiled at his request by G. C. Williamson. London: Privately printed at the Chiswick Press, 1910. Title page.
- Catalogue of the Collection of Jewels and Precious Works of Art, the Property of J. Pierpont Morgan / compiled at his request by G. C. Williamson. London: Privately printed at the Chiswick Press, 1910. Frontispiece: Silver-gilt Pax. No. 70, being Plate XLIX.
- J. Pierpont Morgan, 1837–1913. Catalogue of the Collection of Watches: the property of J. Pierpont Morgan / compiled at his request by G. C. Williamson. London: Privately printed at the Chiswick Press, 1912. Title page.
- J. Pierpont Morgan, 1837–1913. Catalogue of the Collection of Watches: the property of J. Pierpont Morgan / compiled at his request by G. C. Williamson. London: Privately printed at the Chiswick Press, 1912. Frontispiece: Watches made in France—Paris, No. 24, Nicolas Bernard.