Their deeper origins lay in the combination of
nativism among Protestants who had controlled the booming city since the
American Revolutionary War, and tensions between the growing underclass of
Irish immigrants and their kin. In 1827, the UK repealed aspects of the
Passenger Vessels Act 1803, legislation controlling and restricting emigration from Ireland, and 20,000 Irish emigrated; by 1835, over 30,000 Irish arrived in New York annually. In May and June 1834, the silk merchants and ardent abolitionists
Arthur Tappan and his brother
Lewis stepped up their agitation for the abolition of slavery by underwriting the formation in New York of a female anti-slavery society. Arthur Tappan drew particular attention by sitting in his pew (at
Samuel Cox's
Laight Street Baptist Church) with
Samuel Cornish, a mixed-race clergyman of his acquaintance, and an incendiary report by
William Leete Stone Sr. claimed that Cox's sermon asserted that
"Jesus Christ Was A Colored Man". By June, lurid rumors were being circulated by the champion of the
American Colonization Society's
James Watson Webb, through his newspaper
Courier and Enquirer: abolitionists had told their daughters to marry blacks, black dandies in search of white wives were promenading
Broadway on horseback, and Arthur Tappan had divorced his wife and married a black woman. Reports appearing in London in
The Times, taken from American newspapers, cite as the triggering cause a disturbance following a misunderstanding at the
Chatham Street Chapel, a former theater converted with money from Arthur Tappan for the ministry of
Charles Grandison Finney. Edwin G. Burrows and Mike Wallace note that on
July 4, an integrated group that had convened at the chapel to celebrate New York's emancipation (in 1827) of its remaining slaves was dispersed by angry spectators. The celebration was rescheduled for July 7. According to
The Times, the secretary of the New York Sacred Music Society, which leased the chapel on Monday and Thursday evenings, gave a black congregation leave to use it on July 7 to hold a church service. This service was in progress when members of the society who were unaware of the arrangement arrived and demanded to use the facility. Although one member of the congregation called for the chapel to be vacated, most refused. A fracas ensued "which resulted in the usual number of broken heads and benches". Burrows and Wallace note that constables arrived and arrested six blacks. Webb's paper described the event as a Negro riot resulting from "Arthur Tappan's mad impertinence", and the
Commercial Advertiser reported that gangs of blacks were preparing to set the city ablaze. ==Riots erupt==