Intersecting branes in M-theory and chiral matter in four dimensions

We explicitly derive a complementary pair of four-dimensional M-theory brane-world models, linked by a five-dimensional bulk, each of which has a unique anomaly-free chiral spectrum. This is done via resolution of local consistency requirements, in the context of the simplest global quotient T-7/Gamma involving ten-dimensional fixed-planes, for which a chiral four-dimensional spectrum could arise.