after Brereton had floated the second span into position for jacking up to the top of the piers. Brereton was recruited by Brunel staff in 1836 to be one of seven resident engineers supervising the construction of the
Great Western Railway. He lost an eye in a work accident and is depicted in a portrait with an eye patch. After the Great Western railway was completed, he carried out similar tasks on other railways that Brunel was building. For example, in 1845 he was one of Brunel's resident engineers on the
Cheltenham and Great Western Union Railway and was sent to Italy to sort out problems with the construction of the
Turin–Genoa railway. He became Brunel's chief assistant in 1847 and remained in this post until Brunel's death in 1859. His signature appears on drawings for the
Chepstow Bridge which were prepared in Brunel's London office around 1850. One of Brunel's major and long-running projects was the construction of the
Royal Albert Bridge across the
River Tamar for the
Cornwall Railway. In 1854 Brereton was sent as Brunel's assistant to help
William Glennie, the resident engineer on the bridge, who was in poor health. Much of his time in the next five years was spent on this project. He was instrumental in developing ways to excavate underwater to prepare for the construction of the central pier. In 1857 he assisted Brunel when the first span was floated into position, and he then supervised the lengthy process to raise it to the top of its piers. Brunel's poor health increasingly prevented him from attending work in Cornwall, and so Brereton supervised the floating out of the second span in 1858 without Brunel's help. He then saw through the raising of this span, the completion of the bridge and opening of the line in May 1859. ==After Brunel==