PartIII。

　　ThecampofaRomanlegionpresentedtheappearanceofafortifiedcity。^60Assoonasthespacewasmarkedout，thepioneerscarefullylevelledtheground，andremovedeveryimpedimentthatmightinterruptitsperfectregularity。Itsformwasanexactquadrangle；andwemaycalculate，thatasquareofaboutsevenhundredyardswassufficientfortheencampmentoftwentythousandRomans；thoughasimilarnumberofourowntroopswouldexposetotheenemyafrontofmorethantreblethatextent。Inthemidstofthecamp，thepraetorium，orgeneral\'squarters，roseabovetheothers；thecavalry，theinfantry，andtheauxiliariesoccupiedtheirrespectivestations；thestreetswerebroadandperfectlystraight，andavacantspaceoftwohundredfeetwasleftonallsidesbetweenthetentsandtherampart。Therampartitselfwasusuallytwelvefeethigh，armedwithalineofstrongandintricatepalisades，anddefendedbyaditchoftwelvefeetindepthaswellasinbreadth。Thisimportantlaborwasperformedbythehandsofthelegionariesthemselves；towhomtheuseofthespadeandthepickaxewasnolessfamiliarthanthatoftheswordorpilum。Activevalormayoftenbethepresentofnature；butsuchpatientdiligencecanbethefruitonlyofhabitanddiscipline。^61

　　[Footnote60:Vegetiusfinisheshissecondbook，andthedescriptionofthelegion，withthefollowingemphaticwords:—

　　\"Universaquaeixquoquebelligenerenecessariaessecreduntur，secumJegiodebetubiqueportare，utinquovislocofixeritcastra，arma\'amfaciatcivitatem。\"]

　　[Footnote61:FortheRomanCastrametation，seePolybius，l。vi。

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