INTERIOR OF THE HOUSE OF COMMONS.
Her Majesty's faithful Commons meet in a chamber 75 feet by 45 feet and the green benches on the floor and in the side galleries contain 194 fewer seats than there are members. The Speaker's chair is at the north end of the House. In front of it is the Clerk's table, the resting-place of the mace and above it the reporters' gallery, while behind the iron grille, higher still, are the ladies' seats. Peers and strangers, distinguished or otherwise, are admitted to galleries at the opposite end. The party in power occupy the seats on the Speaker's right, the front bench being reserved for Ministers, while on the left sit the Opposition, and on the same side, below the gangway, the Irish Nationalists. The House is lighted at night from above the ceiling, which is of glass.
source: The Queen's London : a Pictorial and Descriptive Record of the Streets, Buildings, Parks and Scenery of the Great Metropolis, 1896