Josiah Wedgwood was Thomas (or Tom) Wedgwood’s father. Both Stubbs and Darwin taught him, Darwin also prescribing the opium to which he later became addicted. Priestley and Watt were friends of Wedgwood’s father’s but with whom he also maintained a correspondence. Southey wrote to Wedgwood about Davy’s nitrous oxide; Davy wrote up Wedgwood’s important photographic image-forming discoveries. Tom and his brother supported Coleridge for most of his adult life, so he could concentrate on writing: Wedgwood and Coleridge were close friends, engaging in passionate intellectual discussion and enthusiastic drug-experimentation.