Foot passengers , jostling jostle one another 's umbrellas in a general infection infection of ill temper temper , and losing lose their foot-hold at street-corners , where tens of thousands of other foot passengers have been slipping slip and sliding slide since the day broke ( if this day ever broke ) , adding new deposits deposit to the crust upon crust of mud , sticking stick at those points tenaciously to the pavement , and accumulating accumulate at compound interest .