44 
ROMAN POTTERY FOUND IN BRITAIN. 
lip and darker red colour-coating have been found at Corbridge 
and at Wilderspool, 4 feet down in a pit —an identity which is too 
perfect to be accidental. Numerous transitional forms between 
the latter and the hammer-head type have also been obtained at 
Corbridge. 
Examples of the hammer-head type, usually in hard white pipe¬ 
clay, with 4 to 6 grooves, are recorded at Poltross-burn (Op. cit. 
p. 452, plate V., 1—4) in the third period deposits (about a.d. 270 
—330), and occur in the latest strata of Corbridge and Wilderspool. 
It was the prevailing type during the latest period of the wall of 
Hadrian, IV. Century. 
27. Rim Fragment of Upright-sided Mortarium, type ib. 
Hard, white-clay, with patches of red-brown coating. Studded with particles 
of iron on inside base. The form of spout is peculiar. 
Original diam. nf ins., height of rim 2 ins. nearly. 
28. Side Fragment of Mortarium, type 2b. 
Clay very hard and blue-black, apparently by overfiring, studded on inside 
base with iron scoriae. 
Original diam. 8 ins. 
The potter's name stamped across the rim—ATOOI (retrograde) 
= ICOTASI ? found also in equally rough lettering at Wilderspool. 
May, Warrington's Roman Remains , p. 64. 
29. Rim Fragment of Mortarium, type 2b, studded with stone 
particles on inside base. 
Original diameter 12 ins. 
