At the 31 March 1974 concert at the Rainbow after Son and Daughter ends and before Keep Yourself Alive is introduced, you can hear Roger speaking for a couple of seconds, but what does he say? It's not something I recognise from the official 2014 release. I've repeated the extract twice, the first one is inverted while the second one is the released version.
Could it be "especially that we can't hear much" or "especially that we don't come here much"?
Taken from the In the Mirror Again - More Lost BBC Sessions album.