In the mid to late 60's, and therefore prior to signing with Motown, the group that would later be known as The Hearts of Stone recorded under various names. These included The Chimes, The Larks and The Four Pennies. The Four Pennies line-up comprised of John Myers, his brother James, Rudolph Hill and Willie Earl Drummond. They released two 45's on the Brunswick label ("You Have No Time To Lose" / "Your A Gas (With Your Trash)" cat. no. 55304 in 1966, and "'Tis The Season" / "Shake A Hand" cat. no. 55324 in 1967.
At Motown, The Hearts Of Stone comprised -
John Myers (baritone),
Lindsey Griffin (first tenor and baritone),
Floyd Lawson (lead) and
Carl Cutler (lead tenor).
Shortly after recording "Stop The World...We Wanna Get On", their only album for Motown, the group split up. John Myers moved from singing secular songs to gospel. Floyd Lawson re-located to Quebec, Canada; where he formed a new group, known as Floyd Lawson and The Hearts Of Stone. Carl Cutler continued to perform on stage right up to the early 2000's. I have not been able to find any info on what became of Lindsey Griffin.