Good day, In "Mathematical Writing" by D. E. Knuth, T. Larrabee and P. M. Roberts, paragraph 22, class of November 9, p. 47 in Notes by PMR: Don's secret delight, he confessed today, is to "play a library as if it were a musical instrument." Using a resources of a great library to solve a specific problem---now, _that_, to him, is real living. Cheers, -- Piotr Rudnicki http://web.cs.ualberta.ca/~piotr