He ordered the cabman to drive straight to a street leading out of Holborn, a very quiet-looking street, where you could buy diamonds enough to set up all the jewellers in the Palais Royale and the Rue de la Paix, and where, if you were so whimsical as to wish to transform a service of plate into "white soup" at a moment's notice, you might indulge your fancy in establishments of unblemished respectability. The gold and silver refiners, the diamond-merchants and wholesale jewellers, in this quiet street, were a very superior class of people, and you might dispose of a handful of gold chains and bangles without any fear that one or two of them would find their way into the operator's sleeve during the process of weighing. The great Mr. Krusible, who thrust the last inch of an Eastern potentate's sceptre into the melting-pot with the sole of his foot, as the detectives entered his establishment in search of the missing bauble, and walked lame for six months afterwards, lived somewhere in the depths of the city, and far away from this dull-looking Holborn street; and would have despised the even tenor of life, and the moderate profits of a business in this neighbourhood. Mr. Dunbar left his cab at the Holborn end of the street, and walked slowly along the pavement till he came to a very dingy-looking parlour-window, which might have belonged to a lawyer's office but for some gilded letters on the wire blind, which, in a very pale and faded inscription, gave notice that the parlour belonged to Mr. Isaac Hartgold, diamond-merchant. A grimy brass plate on the door of the house bore another inscription to the same effect; and it was at this door that Mr. Dunbar stopped. He rang a bell, and was admitted immediately by a very sharp-looking boy, who ushered him into the parlour, where he saw a mahogany counter, a pair of small brass scales, a horse-hair-cushioned office-stool considerably the worse for wear, and a couple of very formidable-looking iron safes deeply imbedded in the wall behind the counter. There was a desk near the window, at which a gentleman, with very black hair and whiskers was seated, busily engaged in some abstruse calculations between a pair of open ledgers. He got off his high seat as Mr. Dunbar entered, and looked rather suspiciously at the banker. I suppose the habit of selling diamonds had made him rather suspicious of every one. Henry Dunbar wore a fashionable greatcoat with loose open cuffs, and it was towards these loose cuffs that Mr. Hartgold's eyes wandered with rapid and rather uneasy glances. He was apt to look doubtfully at gentlemen with roomy coat-sleeves, or ladies with long-haired muffs or fringed parasols. Unset diamonds are an eminently portable species of property, and you might carry a tolerably valuable collection of them in the folds of the smallest parasol that ever faded under the summer sunshine in the Lady's Mile.