1431. (1.) When two prepositions belong to one and the same substantive,
the substantive is expressed with the first. With the second, the
substantive is repeated, or its place is taken by a pronoun: as,
#contrā lēgem prōque lēge#, L. 34, 8, 1, _against the law and for the
law_. #partim contrā Avītum, partim prō hōc#, _Clu._ 88, _partly against
Avitus, partly for him_. If, however, the two prepositions accompany the
same case, the substantive need not be repeated: as, #intrā extrāque
mūnītiōnēs#, Caes. _C._ 3, 72, 2, _inside and outside the works_.
1432. (2.) The second preposition is often used adverbially, without any
substantive: as, #et in corpore et extrā#, _Fin._ 2, 68, _both in the
body and outside_.