In the summer of 1657 Hane was called to a new sphere of action. Cromwell had allied himself with France, and 6,000 English soldiers had been despatched to Flanders. In September Turenne and Sir John Reynolds laid siege to Mardyke, for which purpose the Protector had promised to provide artillery and mortar-pieces. Hane was sent for from Scotland to take part in the siege. He had just obtained leave from Monk to go to England, on account of the dangerous illness of his wife, and Monk's messenger overtook him at Alnwick and brought him back to Scotland. Before he could sail however Mardyke had fallen. On September 29, 1657, Monk wrote to congratulate Thurloe on its capture, and in the same letter announced Hane's departure: 'You may acquaint his Highness that Mr. Hane sett sayle from hence on Saturday morning last the wind being very fair. Hee had his tackling fixt, and everything ready to play his morter-piece, as soone as a platforme should be layd for it; being hee could not gett those materialls there, which hee carried with him, wee thought fitt to provide him heere, and wee hope hee was there on Monday last.' He was immediately sent back to England to report to the Protector the state of his new acquisition. Lockhart wrote on October 3 to Thurloe that in order that his Highness 'might want no informatione that can be given him concerning that place, Mr. Hains, the ingeneer (who hath visited the place and consithered all the defects of it), will be with his Highnesse before these can come to your lordships hands.' When Dunkirk fell Hane was again summoned to inspect and add to its fortifications, but he was taken ill immediately after his arrival. On August 11, 1658, Lockhart informed Thurloe of his death. 'Mr. Hains the ingeneer is dead. I endeavoured all I could to cherish him, both before and during his sicknesse; but the poor man was so desperately mallancholly, as I could not perswade him it was possible for him to live[26].' He had survived all his perils and borne them with a stout heart, only to die a commonplace death and to have it attributed to lack of resolution. _The Journall of Mr. Joachim Hane his Passages in France in the yeare 1653._ A SHORT Relacion of the severall wonderfull passages which I did meete withall in my jorney into France. * * * * *