Under the Police Act of 1857, gambling would not be illegal if it took place offshore*, so many boats on the rivers and in the harbours became gambling dens, while on land the gaming houses were often “like little fortresses, with three, four, and sometimes even seven, strong thick doors to break through and concealed holes in the walls for the gamblers to escape.”
In the late 1800s, the police force further clamped down on gambling. The Gaming Ordinance** of 1870 was passed in strict terms. However, by 1886, gambling had spread so quickly that an even stricter ordinance was passed in 1888. The Police Annual reports, however, continued to acknowledge that getting rid of gambling completely was practically impossible.
*offshore: At sea away from the shore.
*ordinance: a law; an authoritative order