53. How many men were in a milecastle?

Certainty here is impossible, nor is there any guarantee that all milecastles held the same number of men all the time. Comparisons have been made between milecastle internal buildings and fort barrack blocks and the accommodation these offered and this has led to suggestions of between eight and thirty-two men per milecastle. If the upper figure were true, it would mean that nearly half of the fort garrisons would need to have been outposted to man the milecastles.

Further reading: Breeze and Dobson 2000; Symonds and Mason 2009