FEB. 20, 1864THE CAMPAIGN IN SCHLESWIG.POSITION OK TUB AHMIKN.Tin; greater part of tho Danish auny lias takon icfugo at Duppol ar.d in tho island of Alton, to wl.icli they wore ioiimved by i|lu Auatro lTu8.suui forces, while anothrr portion of the Dunes huvo rotired into Jutland. A wtruggie for the possession of Ihq.pd jH about to commence ; but. it is boliovcd that a regular sicgo will bo necoaaary before tho position can bo taken, if it ih taken at all Tho lighting for tho last fow days has been confined to skirmishes botweon the Danish rear guard and reconnoitring parlies of tho Prussians, who are, by special arrangement, allowed to form the van of tho Austro Prussian army. Tho Austrian head-quarters wore at Aponrade and thoso of tho Prussians at Gravenstein a little to tho south of Diippei. A report from Ueuoral do Lutfcichau, tho new Oommandor of tho Danish army, has boon published in Copenhagen. In this report tho General says “that during two days and two nights tho Danish troops had to struggle in tho midbt of snow and ioo, during tho whole course of their rotreat against forces threo times more numerous. Extenuated by futigtfp, but still unbroken, tho Danish battalions, to tho number of fourteen, wcro able to leach tho height**, of Diippei, and thcnco, for a certain number, tho island of Alsou. Cniortunatoly, a body of oOOO infantry and throo regiments of cavalry, who wero separated for several days from tho mam army, weio obliged to proceed northwards towards Jutland, constantly pursued by the enemy. They auocoeded, howovor in crossing tholtivcr Kioaigoau, end cscupod from tho attacks of' tho invading troops.” At Diippol and on tho Island of Alson thero aro nearly {0,000 Danish troops. Tho narrowest point of tho arm of tho sea separating Alson from tho main land lies between tho village of Diippol, on tho peninsular sideof tho strait, and the town of Bondcr-buig on tho island. A bridgo of boats connects tho two sides of tho strait, which aro not moio than 300 paces across. On tho western side of Diippei tho Danes havo two earthworks of immense strongth and bristling with guns of position. The number of cannon mounted upon those works is not accurately known, but is generally admitted to bo very large. The guns in question wore mostly brought from Kendsburg before the Danes gave up that fortress to the troops of the Bund. Tho works at Diippei command not only tho terrain and approaches westward on tho main land, including the chuasre or high road from l-'lonsburg, but also the straits and the opposite shore on the island.By the latest accounts received it appears that tho Danoa aro determined not only to refuse to ontiroly evacuate the duchy of Schleswig, but to endeavour to reconquer it. Their ships of war aro daily hovering about the coast, and there is a probability that an attempt will be made to retuko Flensburg or some otkor town. Tho tlower of tho Danish troops aro posted on tho Diippei heights and at other places. Tho allies, however, know that Aisen must be taken before thoy can bo mastors of all Bchlcawig,and thorolore havo made ovory preparation for laying avigorous siege to tho place. Tho large island of Fomernwhich belongs to Schleswig, is to bo ocoupied by the allies!It was anticipated that an attack would be made for the purpose of compelling the Danes to retire under the protection of their works. The duty of attacking these positions devolves on lTinco Frederick Charles. On the 11th inst. a force estimated at about 1(5,000 men passed through Flensburg. Tho Austrian corps and the combined Prussian Guard division passed through Apenrado on Sunday last, and, as these troops had thus advanced so fur northward, it was even anticipated that tho boundary of Jutland would be crossed though later accounts tend to throw doubt on this statement.The district around Gravenstein and Diippei, which is now 60 strongly ocoupied with the allied troops, is very fertilo and thickly populated. The Sundewitt projects mto tho Baitio, and forms tho peninsular counterpart of the Island of Alsen, from whioh it is separated by the Alsen Sound, and with which it is connected behind tho Diippei heights by two bridges, each of which is about 500 paces long. The strait is deep, and the stream runs so rapidly that it scarcely ever freezes.T1IE HOAD BETWEEN SCHLESWIG AND FLENSBUEG.A correspondent thus describes the road between Bchleawic- and •»----»-------J -- — J— L ____