a fortress in the N. of Britannia Romana, between the Wall and the river Irthing,
where the Ala Petriana was quartered. Camden (p. 1020) identifies it with Old Penrith;
but Horsley (Brit. Romn.
p. 107) and others fix it, with more probability, at Cambeck Fort
) It is called Banna by the Geogr. Ray. (Horsley, p. 498.)