If someone was struck down by illness or injury in the late eighteenth century, the chances are that they would have referred to William Buchan’s Domestic Medicine – with the result that they might have found themselves drinking a broth made from sheep brain or administering drops of urine in their ears. The book’s author, a Scottish physician, published his self-help manual in 1769 specifically for the benefit of those without access to affordable medicine. Melanie King tells his story.