The present paper deals with a collection of 60 rays in a 4-dimensional real vector space represented by the vertices of a hexacosichoron (i.e. a 4-dimensional analogue of the icosahedron). Comment: the reviewer uses the word, the reviewed paper uses 600-cell only.

I jumped in the river, what did I see? / Black-eyed angels swam with me / A moonful of stars and astral cars / And all the figures I used to see

For the first number Bob presented another Bob, namely Bob Murphy, a Cambridge boy who started things going with a snappy toe-dance.

Most audiences are too savvy to pull one over on. I assumed most people would be so far ahead of us.