On a foggy evening in November 1905, 48-year-old Thomas Jackson returned to his home on Melville Street in Vancouver after nine months of prospecting north of the Skeena. Jackson was happy because he had made an important gold strike. Four days later he was dead from strychnine poisoning. Any of the other four people living in the house on Melville Street could have slipped the poison into the mixture of Epsom salts and beer that Jackson took on the...