Beer in London. The best London porter and stout indraught is to be had at the Cock Tavern, No. 201, Fleet-street, and at the Rainbow Tavern, No. 15, Fleet-street, immediately opposite. Connoisseurs in such matters prefer the Rainbow stout in summer, on account of the extra coolness of the cellar. There is no such porter or stout to be had at a tavern in London as at these two places. Judges of ale recommend John Groat’s, No. 61, Rupert-street, Haymarket; and the Edinburgh Castle, No. 322, Strand.
Source: A Handbook for London, Past and Present. Peter Cunningham. Published by John Murray 1849.