Kirchherr later supplied Sutcliffe and the other Beatles with Preludin, which, when taken with beer, made them feel euphoric and helped to keep them awake until the early hours of the morning. The Beatles had taken Preludin before, but it was only possible at the time to obtain Preludin with a doctor's prescription note. Kirchherr's mother received them from a local chemist, who supplied them without asking questions. After meeting Kirchherr, Lennon filled his letters to Cynthia Powell (his girlfriend at the time) with "Astrid said this, Astrid did that", which made Powell jealous, until she read that Sutcliffe was in a relationship with Kirchherr. When Powell visited Hamburg with Dot Rhone (McCartney's girlfriend at the time) in April 1961, they stayed at Kirchherr's house. In August 1963, Kirchherr met Lennon and Cynthia in Paris while they were both there for a belated honeymoon, as Kirchherr was there with a girlfriend for a few days' holiday. The four of them went from wine bar to wine bar and finally ended up back at Kirchherr's lodgings, where all four fell asleep on Kirchherr's single bed.