Aubrey "Chuck" Wallace and Roosevelt Matthews came from Cairo, IL originally, but cut their records in St Louis when they teamed up after Matthews left Billy Ball and the Upsetters. I would think their Ruby 45s were the earliest.

You’re The One is a classic deep soul duet highly regarded in all right thinking musical circles – but is so scarce it’s a pleasure to bring it to the attention of a wider audience. The interplay of the voices is superbly done and the dead slow rhythm marked by upfront horns and a bluesy lead guitar are both excellent. The bridge and the run out groove are particularly impressive – lovely falsetto phrases and gospel vocals. A real gem.

Wallace’s solo side for Ruby is a goodish uptempo funky little tune but it can't hold a candle to the duet numbers.

Powerful Love has been included on a couple of CDs so it’s quite well known. But like the Ruby release it is a marvellous example of duo singing – passionate and thrilling. Lovely guitar touches and carefully arranged horns. The bridge again is quite beautifully done and the climax of the song as they repeat the title refrain when the song runs out is really first rate.

Matthews and Wallace returned to recording in the 80s with a very strange release under the name Hard Tymes. I Ask A Question is an extraordinary track – minimal melodically and with sparse instrumentation it’s really just a vehicle for some wonderful wailing by Matthews and an uncredited female vocalist (or could it be Wallace hitting those high notes?). Both sing their hearts out in this lengthy mood piece vaguely reminiscent of Bobby Womack’s duets with Alltrinna Grayson. I find it hypnotic and strangely moving.

Special thanks to Rob Sevier of Numero Uno records for his kind permission to use the photo of Chuck & Mac and the info in the booklet notes to their excellent CD Twinight's Lunar Revolution on which you can find Powerful Love.