The Mercy released the Sundi disc through Jamie Records in April 1969 and the tune made No.2 on the US chart, selling a million. The group later signed with Warner Brothers, and recorded an album which produced another hit, ‘Forever’, followed up by another Jack Sigler original, ‘Hello Baby’.
Fire Ball is a cookin' Surfadelic instrumental. Alas I've only got a cheapo American copy.
I did pick up a UK demo of this Warner Brothers issue of the single only to find that It was a mispressing and had some terrible ballad on it instead. Luckily the shop gave me my money back, though it would have been handy for this website of course!
Perhaps this mispressing is a clue to why this single appears to be issued on London AND Warner Bros at exactly the same time?!