What is "regall"

Usage examples of "regall".

Accordingly the earl began to make incursions of the frontiers into what Smith calls the Land of Zarkam--among rocky mountains, where were some Turks, some Tartars, but most Brandittoes, Renegadoes, and such like, which he forced into the Plains of Regall, where was a city of men and fortifications, strong in itself, and so environed with mountains that it had been impregnable in all these wars.