Grimesby Roylott in The Adventure of the Speckled Band. Drs. Palmer and Pritchard ... better known as wolfsbane or monkshood. Like antimony, this was also known to the ancients.

The former Wolfsbane singer was brought in to front Iron Maiden following the departure of singer Bruce Dickinson in the 1990s. The band released two albums during his stint as singer, The X ...