Original Receipt from 'Modern Cookery for Private Families' by Eliza Acton (Acton 1845);YORKSHIRE PLOUGHMAN'S SALAD.
Mix treacle and vinegar, in the proportion of one tablespoonful of the first to two of the latter: add a little black pepper, and eat the sauce with lettuces shred small (with an intermixture of young onions when they are liked).
Some ploughmen having lunch
Source: Unknown