Have no data of myne own regarding shroud pins in burials, but I am
wondering what, besides that it was found in a burial context,
differentiates a shroud pin from a pin for other purposes.  I've seen pins
of the 18th and 19th centuries binding cloth, manuscripts, plant specimens,
... even excavated a bunch of them on the 18th century contexts at Belair
Mansion in Bowie MD (JGG do you recall these?) and have seen them in other
assemblages of many periods.
 
Dan W.