"To the north of Durham Place, fronting the street," says Pennant, "stood the _New Exchange_, which was built under the auspices of our monarch in 1608, out of the rubbish of the old stables of _Durham House_. The King, Queen, and Royal Family, honoured the opening with their presence, and named it Britaine's Burse. It was built somewhat on the model of the Royal Exchange, with cellars beneath, a walk above, and rows of shops over that, filled chiefly with milliners, sempstresses, and the like. This was a fashionable place of resort. In 1654, a fatal affair happened here. Mr. Gerard, a young gentleman, at that time engaged in a plot against Cromwell, was amusing himself in a walk beneath, when he was insulted by _Don Pantaleon de Saa_, brother to the Ambassador of Portugal, who, disliking the return he met with, determined on revenge. He came there the next day with a set of bravoes, who, mistaking another gentleman for Mr. Gerard, instantly put him to death, as he was walking with his sister in one hand and his mistress in the other. _Don Pantaleon_ was tried, and with impartial justice condemned to the axe. Mr. Gerard, who about the same time was detected in the conspiracy, was likewise condemned to die. By singular chance, both the rivals suffered on the scaffold, within a few hours of each other: Mr. Gerard with intrepid dignity; the _Portuguese_ with all the pusillanimity of an assassin. "Above stairs," continues Pennant, "sat, in the character of a milliner, the reduced Duchess of Tyrconnel, wife to Richard Talbot, Lord Deputy of Ireland, under James II.; a bigoted Papist, and fit instrument of the designs of the infatuated prince, who had created him Earl before his abdication, and after that, Duke of Tyrconnel. A female, suspected to have been his duchess, after his death, supported herself for a few days (till she was known and otherwise provided for) by the little trade of this place; but had delicacy enough to wish not to be detected. She sat in a white mask, and a white dress, and was known by the name of the White Widow. This Exchange has long since given way to a row of good houses, with uniform front, engraved in Mr. Nichols's _Progresses of Queen Elizabeth_, which form a part of the street."[179]