"Milecastle" . "long-axis" . "gateways type" . . "long-axis milecastle" . "gateways" . "long-axis type" . "Milecastle" . "Milecastle#Gateways" . . . "long/axis" . "configuration" . "long axis" . "Type I gateway" . "Type IV gateway" . . "Type I gateways" . "gateway" . "gateway type" . "Type II gateway" . "Type IV gateways" . "short axis" . . . "Type II gateways" . "Type I" . "Type III gateway" . "axis" . "Type III gateways" . . . "milecastle" . "type" . "fourth fort" . "short-axis milecastle" .