sentences:  A Royal Commission of 1882 concluded that it was necessary to create a cleaner river by separating the sludge part from the liquid sewage and remove it via boat for disposal at sea.In 1887 the first ship of a long line of 'pump and dump' effluent tanker vessels was launched.These ships, later nicknamed by those who crewed them as Bovril boats to describe their brown liquid cargo, were very well maintained, as hygienic as possible, and specially designed for marine disposal.