(How many times can you get the word original into a post!)
The "original" version played out was off emi disks cut from the original studio acetate. There's a picture in Kev Roberts's top 500, I seem to remember, but I can't remember if it's accredited to the 'Prophets' or 'Originals', but the title was originally "Baby have mercy on me" which is what it was originally registered with BMI.
I think it was speeded up a little for the sake of a few chemically enhanced dancers at the time. It was pressed at the time on a UK boot with Eddie Holman -'' Where I'm not wanted'' on the reverse.
A different Original's version was issued on the CD "This is Northern soul! Volume 2" with a different vocalist and slightly different words, but at the correct slower original speed.
Motown then released a comp of Original's tracks, the first one being the original version at the slower speeed, but titled 'Suspicion'
There's another vocal by F. Knows, but it's funky with a whaa whaa guitar on it!
There's also an U/R instrumental of the original take.