A Yale historian, writing a few years ago in The Yale Review, said: ``We in New England have long since segregated our children.'' He was referring not only to the general college situation but more especially to the preparatory schools. And what a galaxy of those adorns that fair land! I don't propose to go into their history, but I have one or two surmises. One is that they were established, or gained eminence, under pressure provided by these same immigrants, from whom the old families wished to segregate their children. In the early days of a homogeneous population, the public school was quite satisfactory.