An unusually lucid discussion of a tangled situation. In reply to Mr. Buckley's question--"Now, if something can last between 1921 and 1968, why can't it last out the balance of the century?"--Mr. Hume gives a masterly account of the threads that came together in the late Sixties to produce the violence that led, in 1972, to Britain's suspending Stormont and assuming direct rule of Northern Ireland.