Lead singer Keith Relf's voice was drowned in echo. The Yardbirds were known for experimenting with distortion and various other effects in their quest for the right sound. This led to an updated Blues sound that Jimmy Page would later use with Led Zeppelin. Page was with The Yardbirds from 1966-1968.
On most US pressings, this was mistitled "I Wish You Could."
There is an alternate take on the British album Remember the Yardbirds.
This was the Yardbirds' first single. It didn't chart because R&B was not popular at the time. The Yardbirds learned this when they finally hit it big with a Pop song, "For Your Love."
This was a cover of Billy Boy Arnold's 1955 hit, which is reputed to be the first blues song to feature electric bass.
The Isley Brother's song, "Contagious," peaked at #19 on the Billboard Hot 100. This meant that the band of brothers became the first group to score a Top 50 hit in six consecutive decades on the chart.