its head-quarters
doubtless, as of yore, at York, though this is not mentioned). Along
with each legion are named ten "squads" [_numeri_], which may perhaps
represent the ten cohorts into which legions were of old divided. The
word cohort seems to have changed its meaning, and now to signify
an independent military unit under a "Tribune." Eighteen of these,
together with six squadrons [_alae_] of cavalry, each commanded by a
"Praefect," form the garrison of the Wall;--a separate organization,
though, like the rest of the northern forces, under the Duke of the
Britains. The ten squads belonging to the Sixth Legion (each under a
Prefect) are distributed in garrison throughout Yorkshire,
Lancashire, and Westmoreland. Those of the Second (each commanded by a
"Praepositus") are partly under the Count of the Saxon Shore, holding
the coast from the Wash to Arundel,[357] partly under the "Count of
Britain," who was probably the senior officer in the island[358]
and responsible for its defence in general. Besides these bodies of
infantry the British Army comprised eighteen cavalry units; three,
besides the six on the Wall, being in the north, three on the Saxon
Shore, and the remaining six under the immediate command of the Count
of Britain, to whose troops no special quarters are assigned. Not a
single station is mentioned beyond the Wall, which supports the theory
that the withdrawal of the Twentieth Legion had involved the practical
abandonment of Valentia.[359]

C. 7.--The two Counts and the Duke were the military leaders of
Britain. The chief civil officer was the "respectable" Vicar of the
Diocese of Britain, one of the six Vicars under the "illustrious"
Pro-consul of Africa. Under him were the Governors of the five
Provinces, two of these being "Consulars" of "Right Renowned" rank
[_clarissimi_,] the other three "Right Perfect" [_perfectissimi_]
"Presidents." The Vicar was assisted by a staff of Civil Servants,
nine heads of departments being enumerated. Their names, however, have
become so wholly obsolete as to tell us nothing of their respective
functions.

C. 8.--Whatever these may have been they did not include the financial
administration of the Diocese, the general management of which was in
the hands of two officers, the "Accountant of Britain" [_Rationalis
Summarum Britanniarum_] and the "Provost of the London Treasury"
[_Praepositus thesaurorum Augustensium_].[360] Both these were
subordinates of the "Count o