|  | Gents Mag 1740 p.172 [Equi]tum: And yet the same Gentleman, in the  
Durham Altar above quoted, where it again occurs,  
dares not venture to read it mille, as he does in the 
Glasgow Altar; and for no other Reason that I can see 
but a Dislike of equestrian Cohorts, tho' I think we  
have the Cohors quarta Gallorum Equitum on another  
Altar found elsewhere. Brit. Rom. on  
Cumberland, Altar LII.
 Certainly if equestrian Cohorts were ever us'd by the 
Romans, the Defence of the Stations near the  
Frontiers, where this Cohort generally resided, seems to  
want such a Garrison most, for the sake of expeditious  
marching where hostile Attempts might call them.
 Accordingly we find the Spanish Cohort with  
Agricola, Vespasian's Legate, at Airdoch in  
Scotland; and it appears to have been about 37 Years  
after this Legate's Resignation, before Hadrian built 
his Vallum, at which Time they probably assum'd the  
Title AElia (attributed to them in this Stone) in  
Compliment to the Emperor, and might have their Quarters  
then at Netherby, where the Altar was found, as an  
advanced Station to the Wall. After this, when the  
Empire was on the decline, I think they have been at  
Ellenborough, on the Coast of Cumberland, by  
Inscriptions found there. See Brit. Rom. p.279. And  
when the Notitia was wrote, a little before the  
Romans abandon'd the Island, they are expressly  
placed at Axelodunum on the Wall, which Mr  
Horsley imagines to be Brugh on the Sands.  
Neither are any Altars yet found that mention their being  
elsewhere in Britain. So what Reason Baron  
Clark has for calling Netherby AEsica, I know  
not, without the Affinity of the Name to ye River Esk 
be the sole Motive. Mr Horsley supposes it to be the  
Castra Exploratorum, but seems to ground his  
Conjectures entirely on the itinerary Distance from  
Carlisle, which is certainly no safe Guide.
 Those that would enquire farther into the Nature of  
equestrian Cohorts, may consult Brit. Rom.  
Ch.VI. Book.I.
 Netherby is about ten Miles North of the Wall; 
there are several other Pieces of Antiquity at it, but as  
they are already published, I shall take no farther Notice  
of them. Our Maps of Cumberland are strangley  
mistaken with respect to the Situation of Places  
thereabouts.
 April 12, 1740.
 G.S.
 P.S. I have another curious Fragment of an ALTAR, lately  
plow'd up at Boulness, to send you when I have Time  
to ride to see it.
 
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