Devil-in-the-Fog is 18th-century—not history, but luscious melodrama, complete with wicked baronet, missing heir, convenient recognition scar, the lot. And much more than the usual lot, because Mr Garfield has humour too and ingenuity in mixing old ingredients to produce something fresh. This is first-person narrative, with showers of exclamation-marks, a proliferation of parentheses, and enough lines of dots to demarcate the parish boundaries on an ordnance map. But the warmth and gusto are genuine enough, the characters swagger, the drama is riveting. (p. 708)

Geoffrey Trease, in New Statesman (© 1966 The Statesman & Nation Publishing Co. Ltd.), November 11, 1966.