Once the thing was started, I had little to do except to change occasionally the rate of fire,"lento," "normale," "vivace," "celere" and "double vivace" by turns.

Throughout the arduous flexuosities of the Mendelssohn E-minor concerto, singing, winding from tonal to tonal climax, and out of the slow movement, which is like a tourniquet twisting the heart into the spirited allegro molto vivace, it was as if beneath Leon Kantor's fingers the strings were living vein-cords, youth, vitality, and the very foam of exuberance racing through them.