In July 1977, his son Karac died at the age of five while Plant was engaged on Led Zeppelin's concert tour of the United States. Plant retreated to his home in the Midlands and for months afterwards he questioned his future.
Plant's early blues influences included Johnson, Bukka White, Skip James, Jerry Miller, and Sleepy John Estes.
Plant had various jobs while pursuing his music career, one of which was working for the major British construction company Wimpey in Birmingham in 1967 laying tarmac on roads.
They both went on to play in the Band of Joy, merging blues with newer psychedelic trends.
In 1968, guitarist Jimmy Page was in search of a lead singer for his new band and met Plant after being turned down by his first choice, Terry Reid, who referred him to a show at a teacher training college in Birmingham (where Plant was singing in a band named Obs-Tweedle).
The group worked on this album while on the road so many of the songs were recorded at separate times rather than in one sitting.
This album sparked much controversy due to the fact some songs on the album, "The Lemon Song" and "Whole Lotta Love" showed similarities from previously written songs by other artists.Page: When I auditioned him and heard him sing, I immediately thought there must be something wrong with him personality-wise or that he had to be impossible to work with, because I just could not understand why, after he told me he'd been singing for a few years already, he hadn't become a big name yet.So I had him down to my place for a little while, just to sort of check him out, and we got along great. With a shared passion for music, Plant and Page immediately developed a strong relationship, and began their writing collaboration with reworkings of earlier blues songs.And then, on the second LP, he wrote the words of Thank You. Most notably "The Battle of Evermore", "Misty Mountain Hop","No Quarter", "Ramble On" and "Over the Hills and Far Away" contain verses referencing Tolkien's The Lord of the Rings and The Hobbit.He said, "I'd like to have a crack at this and write it for my wife." Plant's lyrics with Led Zeppelin were often mystical, philosophical and spiritual, alluding to events in classical and Norse mythology, such as "Immigrant Song", which refers to Valhalla and Viking conquests. Conversely, Plant sometimes used more straightforward blues-based lyrics dealing primarily with sexual innuendo, as in "The Lemon Song", "Trampled Under Foot", and "Black Dog".Led Zeppelin belonged to Atlantic Records and contributed to one-fourth of the profits for that record company.