Despite its associations with cloth caps, clog n’ braces SP is one of the most enduring snuffs. However, definitions of SP seem to be getting broader. Wilsons list snuffs such as Princes, Brunswick and Morlaix on their website under the heading of SP varieties. These are not, in my opinion, SPs at all - or even varieties.
SP is the label for Spanish - here the haul of Havana snuff looted from the Spaniards by Admiral Rooke at Vigo Bay in 1702. This was the first silky-smooth commercially-made snuff introduced in large quantities to Britain. It was almost certainly unscented.
Some people have claimed SP stands for Sheffield Pride. While this is unconvincing it seems that the first SP manufactured in Britain bearing that name originated in Sheffield - possibly at the Sharrow Mill. Be that as it may SP, in my opinion, should have the following characteristics:
Colour - light or golden brown only
Mill - no coarser than demigros
Moisture - dry to medium dry
Flavour - the pungency derives from unscented tobacco. It may however be complemented by hints of the Citrus of Bergamia and lavender only.
Any other definitions?