T here is only one piece of explicit evidence that the Twentieth Legion was ever based at Wroxeter (Viroconium), a tombstone discovered in 1752, since published as RIB 293. That the evidence is explicit, however, has been questioned. The stone is well preserved and the reading is not in doubt: OMANNIVS-C-F-POL-SECV NDVSPOLLENT MILLEG-XX-5 ANORV-LII-STIPXXXI BEN-LEG-PR-H S E G(aius) Mannius \ G(ai) f(ilius) Polflia tribu) Secu\ndus Pollent(ia) | mil(es) leg(ionis) XX an(n)oru(m) LII | stip(endiorum) XXXI | ben(eficiarius) leg(ati) pr(.. .) \ h(ic) s(itus) e(st) 1. 7. leg(ati) pr(incipalis) T. Wright; pr(inceps) Huebner; pr(ovinciae) Mommsen, Haverfield; pr(aetorii) Burn; pr(o praetore) E. Birley, R.P. Wright; leg(ionis) pr(aefecti) Schallmayer. * I am grateful to the Director of the Carlisle Archaeological Unit, Mike McCarthy, and to his colleagues Ian Caruana and Tim Padley, for allowing me to read and publish new texts from Carlisle. Alan Bowman, Ian Caruana, and Michael A. Speidel have kindly sent me relevant work of their own before it was published. Nicholas Milner helped me assemble the parallels cited in note 33. I am also grateful to Mark Hassall, Michael P. Speidel, and Graham Webster for their valuable comments.