Elmer's account is always careful and well balanced, and offers an analysis which is nuanced and entirely persuasive. ... Elmer convincingly shows how Greatrakes's seeming success as a faith healer not only could be used to combat the widelt perceived threat of atheism, but also could be used, by some at least, to promote religious reconciliation and political unity.
John Henry, BJHS
Elmer's forte is micro-biography, and, through meticulous attention to an extraordinary range of manuscript and printed sources, he has built up a profile of those to whom Gratrakes appealed... fascinating
Michael Hunter, History Today
... a well-researched and very readable demonstration of the highly politicised nature of medicine.
Steve Ridge, Social History of Medicine
Elmer succeeds in his stated aim of showing that Greatrakes was at the centre, not the periphery, of the intellectual and political debates of his time. The study adds valuably to understanding of the Hartlib group, the early Royal Society, and the continuing conflicts in England and Ireland over authority in Church and State.
T.C. Barnard, Journal of Ecclesiastical History