After running into this outtake on Youtube (maybe Headley Grange '70?) where the Immigrant Song drum groove transitions perfectly into Bathroom Sound... I began to wonder whether Immigrant Song and Out On The Tiles were initially born as the same jam.
Same take, similar tempo in their early stages, similar drum sound and arrangement, Immigrant Song is in F#... Bathroom Sound/OOTT verses are in F#...
Does anyone else see it? Or is there any info on the subject