Next day the Joy-fire of the Prussians taught Guasco what disaster had happened; and on the fifth day afterwards (August 22d), hearing nothing farther of Daun, Guasco offered to surrender, on the principle of Free Withdrawal. "No, never," answered Tauentzien, by the King's order: "As Prisoners of War it must be!" Upon which Guasco stood to his defences again; and maintained himself,--Gribeauval and he did,--with an admirable obstinacy: the details of which would be very wearisome to readers. Gribeauval and he, I said; for from this time, Engineer Lefebvre, though he tried (with bad skill, thinks Tempelhof) some bits of assault above ground, took mainly to mining, and a grand underground invention called GLOBES DE COMPRESSION; which he reckoned to be the real sovereign method,--unlucky that he was! I may at least explain what GLOBE DE COMPRESSION is; for it becomes famous on this occasion, and no name could be less descriptive of the thing. Not a GLOBE at all, for that matter, nor intended to "compress," but to EXpress, and shatter to pieces in a transcendent degree: it is, in fact, a huge cubical mine-chamber, filled by a wooden box (till Friedrich, in his hurry, taught Lefebvre that a sack would do as well), loaded with, say, five thousand-weight of powder. Sufficient to blow any horn-work, bastion, bulwark, into the air,--provided you plant it in the right place; which poor Lefebre never can. He tried, with immense labor, successively some four or almost five of these "PRESS BALLS" so called (or Volcanoes in Little); mining on, many yards, 15 or 20 feet underground (tormented by Gribeauval all the way); then at last, exploding his five thousand-weight,--would produce a "Funnel," or crater, of perhaps "30 yards in diameter," but, alas, "150 yards OFF any bastion." Funnel of no use to him;--mere sign to him that he must go down into it, and begin there again; with better aim, if possible. And then Gribeauval's tormentings; never were the like! Gribeauval has, all round under the Glacis, mine-galleries, or main-roads for Counter-mining, ready to his hand (mine-galleries built by Friedrich while lately proprietor); there Gribeauval is hearkening the beat of Lefebvre's picks: "Ten yards from us, think you? Six yards? Get a 30 hundredweight of chamber ready for him!" And will, at the right moment, blow Lefebvre's gallery about his ears;--sometimes bursts in upon him bodily with pistol and cutlass, or still worse, with explosive sulphur-balls, choke-pots and infinitudes of mal-odor instantaneously developed on Lefebvre,--which mean withal, "You will have to begin again, Monsieur!" Enough to drive a Lefebvre out of his wits. Twice, or oftener, Lefebvre, a zealous creature but a thin-skinned, flew out into open paroxysm; wept, invoked the gods, threatened suicide: so that Friedrich had to console him, "Courage, you will manage it; make chicanes on Gribeauval, as he does on you,"--and