Now take the train again, or another 13 bus, and go on to the Monument, where King William IV. stands on the very spot where Falstaff and Prince Hal made merry at the “Boar’s Head,” Eastcheap. Going down by the beautiful column which Sir Christopher Wren built to commemorate the Great Fire, hard by where it started in Pudding Lane, turn to your left in Lower Thames Street opposite the church of St. Magnus, and walk along this unattractive causeway till you come to the Coal Exchange with its Corinthian porch. You will find the porter through a door up the side-street of St. Mary-at-Hill. Do not go on Monday, Wednesday or Friday afternoons, for those are marketdays or whatever the correct term is on Coal Exchanges, and, as that most agreeable porter explained to me: “We found it didn’t do, Ma’am; for when the genelmen on the Exchange see me taking a lady or genelman or it might be a party down below into the cellar, they naturally says to me ‘What for?’ And when I say ‘Roman bath,’ they say ‘Roman bath, Jones! Did you say Roman bath? You don’t mean to say there’s a Roman bath below and me here forty years and never know it!’ And down they goes with all their friends, all equally surprised, and business gets neglected. That’s how it is, Ma’am.” Business in the coal trade has been too much neglected for anyone to wish to hinder it further, so go on a Tuesday, Thursday or Saturday afternoon. It is quite worth the exertion, for this hot-air or sweating chamber, with its fire-blackened bricks, forming part of an elaborate system of baths, is even more interesting than the Roman bath in the Strand. The Coal Exchange, with its curious rotunda floor of inlaid wood, was only built in the middle of the nineteenth century, but it has two more unexpected links with the past. I am indebted to Messrs. Thornbury and Walford for pointing out that the black oak used in the woodwork is part of a tree, four or five centuries old, that was discovered in the River Tyne, and the blade of a dagger in the shield of the City arms is made of wood from a mulberry tree that Peter the Great planted when he worked as a shipwright in Deptford Harbour.