According to a Biography episode on various 1960s Brill Building pop songwriters, which included interviews with Greenwich, Barry and Morton among others, Barry said that at the time he was suspicious of Morton's overt attention to Greenwich. Skeptical that Morton was really the songwriter he claimed to be, Barry challenged Morton to prove his legitimacy and bring in samples of his recent work (expecting never to hear again from the unheard-of Morton). Morton stated in his interview that, with an empty song portfolio at the time, he felt sufficiently challenged by Barry, whereupon he left the Brill Building and drove to a Long Island beach. Full of inspiration and determination, Morton spent the evening writing most of his first song "Remember (Walking In The Sand)" while sitting in the dark in his parked car, and the rest of it in the shower back home before heading back to Barry. Morton then 'rolled the dice' and recorded a demo of his song at Long Island's Ultrasonic Recording Studios with an unknown local girl-group that he admired, The Shangri-Las (according to Morton, with the then-unknown Billy Joel on piano in the demo recording),Richard Arfin, Interview with Shadow Morton, 1991, at http://www.theshangri-las.com . Retrieved 15 February 2013 and offered the demo recording to Jerry Leiber, who was then setting up Red Bird Records. "Remember (Walking In The Sand)" reached number 5 on the US Billboard Hot 100 in 1964. This accomplishment transformed Morton overnight from a credential-less industry 'wannabe' into a hit songwriter and producer. According to Steve Kurutz at Allmusic, "Morton's production work, which included brilliant sound effects and inventive percussion, carried the Shangri-Las to girl-group history."Biography by Steve Kurutz, AllMusic, Retrieved 15 February 2013
