White & Co. were employed to ship a valuable cargo on board two vessels chartered by Wardlaw & Son; the Shannon and Proserpine.

Both these ships lay in Sydney harbor, and had taken in the bulk of their cargoes; but the supplement was the cream; for Wardlaw in person had warehoused eighteen cases of gold dust and ingots, and fifty of lead and smelted copper. They were all examined and branded by Mr. White, who had duplicate keys of the gold cases. But the contents as a matter of habit and prudence were not described outside; but were marked Proserpine and Shannon, respectively; the mate of the Proserpine, who was in Wardlaw's confidence, had written instructions to look carefully to the stowage of all these cases, and was in and out of the store one afternoon just before closing, and measured the cubic contents of the cases, with a view to stowage in the respective vessels. The last time he came he seemed rather the worse for liquor; and Seaton, who accompanied him, having stepped out for a minute for something or other, was rather surprised on his return to find the door closed, and it struck him Mr. Wylie (that was the mate's name) might be inside; the more so as the door closed very easily with a spring bolt, but it could only be opened by a key of peculiar construction. Seaton took out his key, opened the door, and called to the mate, but received no reply. However, he took the precaution to go round the store, and see whether Wylie, rendered somnolent by liquor, might not be lying oblivious among the cases; Wylie, however, was not to be seen, and Seaton, finding himself alone, did an unwise thing; he came and contemplated Wardlaw's cases of metal and specie. (Men will go too near the thing that causes their pain.) He eyed them with grief and with desire, and could not restrain a sigh at these material proofs of his rival's wealth—the wealth that probably had smoothed his way to General Rolleston's home and to his daughter's heart; for wealth can pave the way to hearts, ay, even to hearts that cannot be downright bought. This reverie no doubt, lasted longer than he thought, for presently he heard the loud rattle of shutters going up below. It was closing time; he hastily closed and locked the iron shutters, and then went out and shut the door.

He had been gone about two hours, and that part of the street, so noisy in business hours, was hushed in silence, all but an occasional footstep on the flags outside, when something mysterious occurred in the warehouse, now as dark as pitch.

At an angle of the wall stood two large cases in a vertical position, with smaller cases lying at their feet. These two cases were about eight feet high, more or less. Well, behind these cases suddenly flashed a feeble light, and the next moment two brown and sinewy hands appeared on the edge of one of the cases—the edge next the wall; the case vibrated and rocked a little, and the next moment there mounted on the top of it not a cat, nor a monkey, as might have been expected, but an animal that in truth resembles both these quadrupeds, viz., a sailor; and need we say that sailor was the mate of the Proserpine? He descended lightly from the top of the case behind which he had been jammed for hours, and lighted a dark lantern; and went softly groping about the store with it.

This was a mysterious act, and would perhaps have puzzled the proprietors of the store even more than it would a stranger. For a stranger would have said at once this is burglary, or else arson; but those acquainted with the place would have known that neither of those crimes was very practicable. This enterprising sailor could not burn down this particular store without roasting himself the first thing; and indeed he could not burn it down at all; for the roof was flat, and was in fact one gigantic iron tank, like the roof of Mr. Goding's brewery in London. And by a neat contrivance of American origin the whole tank could be turned in one moment to a shower-bath, and drown a conflagration in thirty seconds or thereabouts. Nor could he rifle the place; the goods were greatly protected by their weight, and it was impossible to get out of the store without raising an alarm, and being searched.

But, not to fall into the error of writers who underrate their readers' curiosity and intelligence, and so deluge them with comments and explanations, we will now simply relate what Wylie did, leaving you to glean his motives as this tale advances.

His jacket had large pockets, and he took out of them a bunch of eighteen bright steel keys, numbered, a set of new screwdrivers, a flask of rum, and two ship biscuits.

He unlocked the eighteen cases marked Proserpine, etc., and, peering in with his lantern, saw the gold dust and small ingots packed in parcels, and surrounded by Australian wool of the highest possible quality. It was a luscious sight.

He then proceeded to a heavier task; he unscrewed, one after another, eighteen of the cases marked Shannon, and the eighteen so selected, perhaps by private marks, proved to be packed close, and on a different system from the gold, viz., in pigs, or square blocks, three, or in some cases four, to each chest. Now, these two ways of packing the specie and the baser metal, respectively, had the effect of producing a certain uniformity of weight in the thirty-six cases Wylie was inspecting. Otherwise the gold cases would have been twice the weight of those that contained the baser metal; for lead is proverbially heavy, but under scientific tests is to gold as five to twelve, or thereabouts.

In his secret and mysterious labor Wylie was often interrupted. Whenever he heard a step on the pavement outside he drew the slide of his lantern and hid the light. If he had examined the iron shutters he would have seen that his light could never pierce through them into the street. But he was not aware of this. Notwithstanding these occasional interruptions, he worked so hard and continuously that the perspiration poured down him ere he had unscrewed those eighteen chests containing the pigs of lead. However, it was done at last, and then he refreshed himself with a draught from his flask. The next thing was, he took the three pigs of lead out of one of the cases marked Shannon, etc., and numbered fifteen, and laid them very gently on the floor. Then he transferred to that empty case the mixed contents of a case branded Proserpine 1, etc., and this he did with the utmost care and nicety, lest gold dust spilled should tell tales. And so he went on and amused himself by shifting the contents of the whole eighteen cases marked Proserpine, etc., into eighteen cases marked Shannon, etc., and refilling them with the Shannon's lead. Frolicsome Mr. Wylie! Then he sat down on one of the cases Proserpine'd, and ate a biscuit and drank a little rum; not much; for at this part of his career he was a very sober man, though he could feign drunkenness, or indeed anything else.