Series Is Presented Here As 3 Variables: (1) Original Data, 1860-1912; (2) Original Data, 1919-33; (3) Original Data, 1928-35. Source: Board Of Trade
This NBER data series a02085ab appears on the NBER website in Chapter 2 at http://www.nber.org/databases/macrohistory/contents/chapter02.html.
NBER Indicator: a02085ab
Release: NBER Macrohistory Database
National Bureau of Economic Research, Railways, Maintenance of Ways and Structures for Great Britain [A025ABGBA403NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/A025ABGBA403NNBR/, September 4, 2015.