@spendius,
I doubt that I've ever read any Temperance Society pamphlets, Spendi. My information comes from several Scandinavian authors (obviously not Sterne), writing on the subject of how some legislatures e.g. the Icelandic Althyng, devolped from simple clan and tribal councils. Alcohol was usually taboo at these gatherings. And since these folk were close kissin' cousins to the Germanic Goths, Vandals, Angles (especially the Angles who hailed from Denmark) and Saxons, it's not too much of a stretch to assume that the prohibition was probably damn' near general. That doesn't mean, of course, that it might not have been violated from time to time. Their consumption of strong brew was prodigious at most other times.
In Stern's case, I would suggest the claim was just a matter of wishful thinking.