By late June 1968, reports of the Yardbirds' breakup hit the music press. 

Billboard - June 29, 1968:

Yardbirds To Make Changes

NY - The Yardbirds will reshuffle its personnel before returning to the U.S. in October for a series of college concerts. Remaining in the English group will be guitarist Jimmy Page and bassist Chris Dreja. A new drummer and vocalist will be added to the group, which will now be known as Yardbirds featuring Jimmy Page.