Read it through once

Stack drew his chair a little closer. "I've been up at Chalk Farm, the 'Yarborough Arms'; you know, where the 'buses stop. Bob Barrett does a deal of business up there. He pays the landlord's rent for the use of the bar--Wednesdays, Fridays, and Saturdays is his days. Charley Grove bets there Mondays, Tuesdays, and Thursdays, but it is Bob that does the biggest part of the business. They say he's taken as much as twenty pounds in a morning. You know Bob, a great big man, eighteen stun if he's an ounce. He's a warm 'un, can put it on thick."