Although he was watching closely when the mummer was poisoned, it took Gil Cunningham several days and three more poisonings to work out how it was done. Danny Gibson and Nanty Bothwell, rivals for the affections of Agnes Renfrew, the apothecary's pretty daughter, are also good friends. When they both take part in the festive play at the house of Gil's sister Kate, it ends in Danny's death, apparently by poison from his friend's flask. So was it deliberate,...