The passage of the Rebellion Losses Bill on the night of April 25, 1849, led to the sacking and arson of the St. Anne's Market parliamentary building. The fire, set by Loyalist rioters attempting to disrupt an ongoing Assembly session, spread to nearby building and burned rapidly. Firefighters sent to respond to the fire at St. Anne's Market were slowed by mobs of rioters, leading to the building's total destruction within two hours. Over 23,000 volumes in the parliamentary library, as well as the partial archives of Upper Canada and Lower Canada, were lost in the fire. The parliament reconvened the following day, April 26, at the Bonsecours Market, where it would reside until moving permanently to Toronto.