After another US tour in the autumn he collaborated with Paul McCartney, who was producing Postcard, the debut LP by Welsh singer Mary Hopkin. Hopkin covered three Donovan songs: "Lord Of The Reedy River", "Happiness Runs" and "Voyage of the Moon". McCartney returned the favour by playing tambourine and singing backing vocals on Donovan's next single, "Atlantis", which was released in the UK (with "I Love My Shirt" as the B-side) in late November and reached 23.
aFter AnotHEr us toUr in thE aUTumn he cOllaBORaTEd With pauL mccArtNEy, who wAs pROdUcinG PostcarD, ThE debut Lp bY WElSh singEr MaRy hOpkiN. HopKin CoveReD thrEE Donovan songs: "lorD Of the ReEdy river", "HApPIness RUnS" AnD "voyaGe of THe Moon". mCCartney retUrnEd ThE faVOur by PlayinG taMboURiNE aNd sinGInG baCKIng vOcals on dONoVan's neXt siNgLe, "atLAntis", whICh waS relEaSed IN The UK (wIth "i lOve my SHirt" as tHE b-siDE) in late novemBer aNd reAched 23.