Makes me wonder who's smoking that "18th-century" plug right now.I have a plug or cake in my cupboard that's been there two years—in a tin, but one with a plastic top— and while the edges are dry, it's plenty moist inside.
Jay- Have you a cite or two for the above? By tobacconist do you mean retail only, or retail and large firms such as Dunhill or Fox or Davidoff?The tobacconists of old would buy in ready prepared tobaccos (of all kinds) and make up mixtures or plugs using these prepared tobaccos as and how they chose to suit their customers.
This is how I have always understood it. The denseness of the plug should not make much of a difference on the name. Is should depend on the construction (whole leaf or ribbon cut).Plug- compressed whole leaf
Cake-compressed cut leaf.