Frederic William Maitland,
Domesday Book and Beyond: Three Essays in the Early History of England
“ In what sense can a crime be a custom? In a fiscal sense. A crime is a source of revenue. In what sense should we wish to have our land free of crimes, free even, if this be possible, of larceny and homicide? In this sense:—we should wish that no money whatever should go out of our land, neither by way of rent, nor by way of tax, rate, toll, nor yet again by way of forisfactura, of payment for crime committed. ”
