Green’s Dictionary of Slang

a tout for lottery insurance.

1797		P. Colquhoun Police of the Metropolis 153: Morocco Men, who go about from house to house among their former customers, and attend in the back parlours of Public Houses, where they are met by customers who make insurances.
1849		Sheffield indep. 29 Dec. 5/6: The ‘Touters’ for Lotteries — The ‘Morocco men,’ so called from the red morocco pocket-books whcih they carried [...] They began their lives as pigeons; they closed them as rooks.
1868		Brewer Dict. of Phrase and Fable .
1894		Brewer Dict. of Phrase and Fable II 861/2: Morocco Men (The), Public-house and perambulating touts for lottery insurances. Their rendezvous was a tavern in Oxford Market, on the Portland estate, at the close of the eighteenth century.