The Anti-Slavery Society Convention, 1840. This 10 megapixel image from the National Portrait Gallery, London depicts in striking detail the pivotal 1840 Anti-Slavery Society Convention, with an elderly Thomas Clarkson speaking. It contains 136 identifiable persons, and has been used to illustrate more than 28 articles in the English Wikipedia alone.
This week's "Features and admins" covers Sunday 8 – Saturday 14 May
