The conversion of the gauge on the South Wales section of the Great
Western railway in 1872 was of the heaviest description, the period of
labour lasting from seventeen to eighteen hours a day for several
successive days. It was the greatest work of its kind, and nothing
exactly like it will ever be done in England again. The lines of rail to
be connected would have made about 400 miles in single length, the number
of men employed was about 1500; and the time taken was two weeks nearly.
Oatmeal and barley water was made into a thin gruel and given to the men
as required. It was the only drink taken during the day. I had not a
single case of drunkenness or illness. I have often heard these men
speak with great approbation of the supporting power of oatmeal drink.
—_J. W. Armstrong_, _C.E._