A pair of spectacles: left, a policeman pierces W.E. Gladstone's hat with his sword; right, a man is about to throw a stone at a policeman. Drawing by G. Hutchinson, ca. 1890.

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A pair of spectacles: left, a policeman pierces W.E. Gladstone's hat with his sword; right, a man is about to throw a stone at a policeman. Drawing by G. Hutchinson, ca. 1890. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.