p. 249 '... the conclusion that Mary (Grave) Dowe was married a second time, between 1677 and 1680, to Richard Smith of Hartford, seems inescapable.'
The author presents the evidence prior to this statement, including mentioning the baptisms of two children of Richard Smith by his first wife, in 1677 and 1678. Thus, the year range for the marriage should be 1678 to 1680.
