The first recording of this song was by Ronnie Burns in Australia. It was a top 20 hit for him in Australia in July 1967. The Abi and Esther Ofarim version was also out in mid 1967 on a single. They worked mainly in Europe,
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not the US, including Germany where the Bee Gees were very, very popular, but I just don't know whether it was a hit single.
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The Bee Gees version
Verse 6
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was first out on the movie soundtrack album Melody at the start of 1971, by the way. Best of vol.2, 1973 is the first actual Bee Gees album that had it. This is their second recording of it; that first one,
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was recorded as a demo by Bee Gees in late 1966 and first released in 1970 on the Inception