The Nuttall Encyclopedia
A class of lunatics allowed out of restraint, at one time, to roam about and beg; a set of impostors who wandered about the country affecting lunacy.
Wood, James, ed. Entry for 'Abraham-Men'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/a/abraham-men.html. Frederick Warne & Co Ltd. London. 1900.