Steinhardt, Dalley, Tree and Soyer coalesced into the Guarneri Quartet at the Marlboro Music School and Festival in Marlboro VT, where all of them spent summers during the early 1960s. During the summers of 1962 and 1963, the four played chamber music together in various permutations, and with encouragement from Festival director Rudolf Serkin and from Alexander Schneider (second violinist of the Budapest String Quartet) the new quartet was launched on 2 August 1964 with a concert at Marlboro. The name Guarneri was suggested by Boris Kroyt (violist of the Budapest String Quartet), who had played with a short-lived group of that name in Germany before World War II.