797 - Pink Floyd See Emily Play 1967

During the sessions for the song, David Gilmour was a visitor to the studio, after being invited by Syd. He was shocked by what he perceived as a change in Syd's personality, and Syd did not appear to even recognise his old friend, despite having invited him there in the first place. For many years Gilmour would recall this encounter with the saying, "I'll go on record as saying, that was when he changed."
The slide guitar work on the song is said to have been done by Barrett with a Zippo lighter. The train depicted on the single's sleeve was actually drawn by Barrett himself.