At this point in the month of January for the "Get Back/Let It Be" project, the venue for recording had changed in order (for one thing) to appease George Harrison who had decided to re-join the group at this point once the location of filming/recording convened at the new (for the time) Apple Studios at 3 Savile Row in London. At this time, there was no conclusion to the filming or recording planned although the time line was currently slated for the end of the month.
On January 20 1969, The Beatles arrived at Apple Studios but found that the recording equipment set up by their electronics "friend" Magic Alex was non-functional and a call was put in to EMI to bring in an eight track, desk, monitors, etc. This was all formalized by the next day. It would also mean that Ringo's drum kit would be recorded in stereo for the first time in the band's recorded tenure.
On January 21 1969, The Beatles got down to work by recording "I've Got A Feeling", "Shout!", "Don't Let Me Down" but mostly concentrated on the song "Dig A Pony". This is also the day where the introduction with Lennon's famous quote "I Dig a Pony by Charles Hawtrey and the Deaf-Aids...phase One, in check Doris gets her oats!". The quote can be heard as the very first thing on side one of the Apple LP/CD "Let It Be" just before the song "Two Of Us" kicks in.
Work continues with a nice take of "She Came In Through the Bathroom Window". This particular take can be heard on the Apple 3 LP/2 CD "Anthology 3".