In coal mines; A lever at the top of a shaft for rapping a signal.

Policeman (from the blue colour of a raw lobster and a policeman's uniform)

[Palmer, Roy - A Touch on the Times Songs of Social Change 1770 to 1914 (Penguin Education, 1974) pp 62]

Money [OED]

Reins [CPB] : long narrow straps, frequently of leather, attached to the bridle or bit of a horse or other animal on either side of the head and used by a rider or driver to control and guide the animal [OED]

Rick - A stack of hay, corn, etc.; esp. one formed into a regular shape and thatched. [OED]

lavish, generous, unstinting, Plenty, abundance [Dictionary of the Scots Language]

People of low social class or position; disreputable or undesirable people; members of the rabble considered collectively. The dregs or lowest element of a community, class [OED]

Rigging: The action of preparing a ship or boat for going to sea, esp. by fitting the necessary ropes, chains, and wires. [OED] and by extension the ropes, chains, and wires themselves [CPB]

Rig:to romp, frolic; to act or play energetically and excitedly [OED]

Rig: A dishonest or fraudulent scheme or enterprise; a trick or swindle. Also something used to deceive or defraud a person.

Roast: to severely ridicule [OED]

Rob Roy was a legendary cateran -  A Highland marauder or irregular fighting man {i} - and the eponymous hero of the novel by Walter Scott published in 1817 {ii}

References:
{i} Dictionary of the Scots Language - accessed 12Oct2019
{ii}  http://www.walterscott.lib.ed.ac.uk/works/novels/robroy.html - accessed 12Oct2019

A place containing a dense aggregation of people [OED] often used of slums

A long stretch of ground where ropes are made [OED]

Ross: John Ross (1777-1856) British naval officer and Arctic explorer.
https://en.wikipedia.org/wiki/William_Parry_(explorer)

A group of people gathered or assembled together [OED]

Rout:  A fashionable gathering; a large evening party or soirée of a type fashionable in the 18th and early 19th centuries. [OED]

 a noisy disturbance; (also) a brawl.

The gathering together of a group of soldiers usually in preparation for departing on active service.

Possible "route"