Keyboardist Richard Wright later described these sessions as "falling within a difficult period", and Waters recalled them as "torturous". Mason found the process of multi-track recording drawn-out and tedious, while Gilmour was more interested in improving the band's existing material. Gilmour was also becoming increasingly frustrated with Mason, whose failing marriage had brought on a general malaise and sense of apathy, both of which interfered with his drumming. Humphries gave his point of view regarding these struggled sessions in a 2014 interview: “There were days when we didn't do anything. I don't think they knew what they wanted to do. We had a dartboard and an air rifle and we'd play these word games, sit around, get drunk, go home and return the next day. That’s all we were doing until suddenly everything started falling into place.” After several weeks, Waters began to visualise another concept. The three new compositions from 1974's tour were at least a starting point for a new album, and "Shine On You Crazy Diamond" seemed a reasonable choice as a centrepiece for the new work. Mostly an instrumental twenty-minute-plus piece similar to "Echoes", the opening four-note guitar phrase reminded Waters of the lingering ghost of former band-member Syd Barrett. Gilmour had composed the phrase entirely by accident, but was encouraged by Waters' positive response. Waters wanted to split "Shine On You Crazy Diamond", and sandwich two new songs between its two halves. Gilmour disagreed, but was outvoted three to one. "Welcome to the Machine" and "Have a Cigar" were barely veiled attacks on the music business, their lyrics working neatly with "Shine On" to provide an apt summary of the rise and fall of Barrett; "Because I wanted to get as close as possible to what I felt ... that sort of indefinable, inevitable melancholy about the disappearance of Syd." "Raving and Drooling" and "You Gotta Be Crazy" had no place in the new concept, and were set aside until the following album, 1977's "Animals". On 5 June 1975, on the eve of Pink Floyd's second US tour that year, Gilmour married his first wife, Ginger. That day, the band were completing the mix of "Shine On You Crazy Diamond" when an overweight man with shaven head and eyebrows entered, carrying a plastic bag. Waters did not recognise him.