Like its predecessors, Triangle takes off from established facts, then proceeds to lace its theses with a hodgepodge of half-truths, unsubstantiated reports and unsubstantial .
Father Quinn thought of the fishermen who went out upon Galway Bay in wretched, unsubstantial tarred-canvas boats the only boats they could afford.
The Professor's House has been declared "unsubstantial" beside One of Ours and A Lost Lady.