Note: As mentioned earlier The Beatles were also creating a "Various Ad libs" collection of sounds on tape and during takes 8 and 9, John, George & Ringo fell into a session jam, this being a 'purely instrumental piece with much electric guitar'. (Mark Lewisohn explains that something like this would only be done at the two-track, quarter-inch tape stage, not so early on.) They took the beginning of this 'new' take 17 and edited it onto the end of the 'new' take 16, which gives it that distinctive 'cut' that can be heard at the 3'17" mark on the song and which runs through to the fade out. Then, for the first time on a Beatles recording, the original four-track tape was hand edited. Then there was a reduction mix of a portion of take 14. After two reduction mixes were made of take 6, they were labelled Take 15 and 16.
14 takes were made for the basic track with drums, bass, rhythm and lead guitars. Scott, being recorded in the small annex to the studio two control room. So it was after John got "Sexy Sadie" to a point where he could leave it for a while, he then began "Yer Blues" as 'recommended' by Mr. Here's some more information about "Yer Blues" from "A Hard Day's Write" written by Steve Turner.