The right wing of King William's army, under Meinhard
Schomberg, was prevented from engaging the left wing of King James's
army by a deep ravine at Roughgrange.
The obstacle, which "the Devil himself could have never got through",
prevented any engagement between the 10,000 Williamites who had crossed
the Boyne upstream from Rossnaree, and the 17,000 soldiers of King
James's army who had marched from Oldbridge to protect their left wing.
The stand-off lasted until early afternoon when King James left the
field after learning of the collapse of his under-strength right wing
at Oldbridge/Donore. Still relatively untroubled by Meinhard
Schomberg's force, the Jacobites left wing then withdrew towards
Duleek.
