Old song

This is an excellent song.The first ever version i heard of this song was about,5 years back,by the Hootenanny Singers.Finally,after about 3 years,i managed to find the original version of this song.Coincidentally,the artist (donovan) has worked with my favourite band and has helped them.He taught lennon and mccartney finger picking styles which they later used in songs like,blackbird.julia and dear prudence.