Two Weeks Last Summer
Dave Cousins is the pricipal song writer of the Strawbs. There are several version of this song with Sandy Denny singing. On the first, she sings accompanied only by a single guitar; it appears on Sandy Denny and the Strawbs (but not on the CD All Our Own Work), on the Strawberry Music Sampler No. 1, and in 2005 on the CD Where the Time Goes.
A second version with full accompaniment and altered lyrics was intended for release on the abortive Fotheringay 2 album; it was recorded at Sound Techniques in Autumn 1970 and released both on the Who Knows Where the Time Goes? box set and the Fotheringay CD reissue by Hannibal. Finally, in 2008 Fledg'ling Records published the Fotheringay 2 CD.
An earlier live version, recorded at the Holland Pop Festival in Rotterdam on 28 June 1970, appeared in 2004 on the second (Fledg'ling) CD reissue of Fotheringay.
Bryony Holden sang Two Weeks Last Summer in 2013 on her Sandy Denny tribute album Across the Purple Sky.
Sorry, I can't show the lyrics here as I don't have the copyright owners' permission to publish them. But please feel free and ask me to send you the song's lyrics.