The
London Congregational Union (LCU) began in a small way in 1873. In 1894 it claimed 250 affiliated churches. Its headquarters was the
Congregational Memorial Hall. Mearns became its secretary in 1876, and in 1879 the post was made full-time, Mearns giving up his role at Markham Square. In 1887, speaking in
Adelaide, the congregationalist
Albert Spicer described an all-night walk he and his wife Jessie had taken with Mearns eastwards in London, starting from the
West End. In 1892 Mearns, allied with the chairman Edward Spicer and the treasurer, threatened not to stand again, in reaction to constitutional changes making the Union's Council fully elected, without
co-option. Edward Spicer (1839–1912) was chairman of Spicer Brothers, while Albert Spicer was a partner in James Spicer & Sons, two paper companies run by cousins that merged in 1922.
The Bitter Cry of Outcast London Albert Spicer and Mearns were credited in 1888 for the LCU initiative in publishing the 1883 pamphlet
The Bitter Cry of Outcast London. The writer was, by current consensus, William Carnall Preston (1837–1902); James Munro was involved in the field work and research, with Mearns. (Munro, who had been pastor at the Congregational church in
Limerick, had before that been at Muirkirk, Ayrshire, at the Evangelical Union Church.)
Ben Tillett, who disliked the pamphlet's
sensationalism, gave attribution to
Arnold White. The pamphlet itself acknowledges research assistance from
Archibald G. Brown at the East London Tabernacle (now a Baptist church) and the
London City Mission. Its substance covered
overcrowding, "slum narrative" and criticism of current church attitudes. Darley in her biography of
Octavia Hill comments that
The Bitter Cry of Outcast London "was merely the most sensational publication in what had become a debate in print." The year 1883 saw also the publication of the books
How the Poor Live by
George Robert Sims, illustrated by
Fred Barnard, based on articles first appearing in the
Pictorial World. Mearns permitted Sims to write that the articles had assisted the pamphlet.
Gertrude Himmelfarb writes "It is not clear why Sims's articles, which were provocative enough at the time, were overshadowed four months later by
The Bitter Cry of Outcast London." She states that the author had in common with Sims a wish for
state intervention and "the right to live as something better than the uncleanest of brute beasts." ==Later life==