In 1964, after having been introduced to cannabis by Bob Dylan in New York, Epstein was observed by McCartney standing in front of a mirror, pointing at himself and repeatedly saying "Jew!", while laughing loudly, which McCartney found hilarious and "very liberating". Epstein later became heavily involved in the 1960s drug scene. During the four months when the Beatles' album "Sgt. Pepper" was being recorded, Epstein spent his time on holiday, or at the Priory Clinic in Putney, where he tried unsuccessfully to curb his drug use. He left the Priory to attend the "Sgt. Pepper" launch party at his house on 24 Chapel Street, but returned to the Priory immediately after.