FrontiersFri., Dec. 28, 2018 | Olga Tsapina, Ph.D.A collection of correspondence yields insight into the Seven Years' WarOn November 13, 1756, James Grahame hastily scribbled a letter at his London residence. The note, addressed to William Mercer in Perth, Scotland, confirmed that Grahame’s friend and William’s brother, Colonel James F. Mercer, was dead.