SULLONIACAE a town in Britannia Romana (Itin. Ant. p. 471), now Brockley Hill in Hertfordshire. (Camden, p. 359.) [T.H.D]
Dictionary of Greek and Roman Geography, illustrated by numerous engravings on wood. William Smith, LLD. London. Walton and Maberly, Upper Gower Street and Ivy Lane, Paternoster Row; John Murray, Albemarle Street. 1854.