There are numerous attempts at the Heartbreaker guitar solo takes as evidenced on the Led Zeppelin - Led Zeppelin II Classic Records 45rpm Treasured Version (Empress Valley Supreme Disc - EVSD-953), 1CD [2017] boot, with Page saying "I'll do another couple" at the beginning of the available tape, which has several cuts. Definitely a day when Jimmy lost the thread several times as he tuts to himself throughout the session.