At the 1886 general election he was elected in Crewe, where the sitting Liberal MP George Latham had not sought re-election. McLaren was re-elected in 1892, but lost his seat at the 1895 general election. He did not stand in 1900, when the seat was regained for the Liberals by James Tomkinson, but when Tomkinson died shortly after being re-elected at the January 1910 election, McLaren was the successful Liberal candidate in the resulting by-election.[5] He held the seat until his own death in 1912, aged 59.[4]
Walter is buried with his parents in St Cuthberts Churchyard in Edinburgh. Although the monument, lying on the east wall of the first south section under Edinburgh Castle, is huge, Walter is relegated to a simple footnote at the base of the stone.
^Linda Walker, ‘McLaren , Eva Maria (1852/3–1921)’, Oxford Dictionary of National Biography, Oxford University Press, 2004; online edn, Oct 2009 accessed 12 Jan 2017
^ abCraig, F. W. S. (1989) [1974]. British parliamentary election results 1885–1918 (2nd ed.). Chichester: Parliamentary Research Services. pp. 231, 512. ISBN0-900178-27-2.