Cork historian Robert Day and Franz Tieze collaborated in supplying goblets to a ready market of glass collectors.
Thomas Rohan, in his Confessions of a Dealer (London, 1924), noted the flood of Volunteer and Williamite glasses in Dublin.
It was disclosed that almost without exception every single glass piece supposedly engraved in support of the Irish Volunteer regiments of the late 18th century was the work of Franz Tieze.
This conflicts with evidence unearthed by Boydell and Francis, which shows that Tieze had been engraving pieces "after 1913 and possibly as late as 1918".
Initially the researchers investigated only Williamite glass, which supposedly was made to celebrate the victory of William of Orange (1689–1702) over the Stuarts.