See COVE Master Map entry on Haymarket:
https://editions.covecollective.org/place/haymarket
In London Labour and the London Poor edition:
Phase 1
The “King” of the Tumbling-Boy Crossing-Sweepers. (Volume 2): "I work a good deal fetching cabs after the Opera is over; we general open the doors of those what draw up at the side of the pavement for people to get into as have walked a little down the Haymarket looking for a cab. We gets a month in prison if we touch the others by the columns. I once had half a sovereign give me by a gentleman; it was raining awful, and I run all about for a cab, and at last I got one. The gentleman knew it was half a sovereign, because he said—‘Here, my little man, here’s half a sovereign for your trouble.’ He had three ladies with him, beautiful ones, with nothink on their heads, and only capes on their bare shoulders; and he had white kids on, and his regular Opera togs, too. I liked him very much, and as he was going to give me somethink the ladies says—‘Oh, give him somethink extra!’ It was pouring with rain, and they couldn’t get a cab; they were all engaged, but I jumped on the box of one as was driving along the line. Last Saturday Opera night I made fifteen pence by the gentlemen coming from the Opera."
Phase 2
Of the Number of Street Stalls. (Volume 1)
Bone-Grubbers and Rag-Gatherers. (Volume 2)
Boy Crossing-Sweepers and Tumblers. (Volume 2)
Of Prostitution in London (Volume 4)
No. 47, Answers to Correspondents