Spring was taking a while to get going in April 1673 but this week was a little warmer for Hooke and his companions in Restoration London. Hooke suffered on and off from his usual insomnia, this time accompanied by ‘sweat’ and perhaps fever. It may have been this that prompted Hooke to branch out into the pharmacopaeia and try a few more herbal remedies: wormwood ale; ‘white helebor sneez & tobacco’; Annis[eed] cordiall; and ‘andrews’ (a proprietary preparation of unknown composition). Some of these medicines were more benign than others . . .