The Walloons, and other regiments were distributed in different places, so as completely to encircle the town. [Pierre Sterlinckx: Eene come Waerachtige Beschryvinghe van alle Geschiedinissen, Anschlagen, Stormen, Schermutsingen oude Schieten voor de vroome Stadt Haerlem in Holland gheschicht, etc., etc.-- Delft, 1574.--This is by far the best contemporary account of the famous siege. The author was a citizen of Antwerp, who kept a daily journal of the events as they occurred at Harlem. It is a dry, curt register of horrors, jotted down without passion or comment.-- Compare Bor, vi. 422, 423; Meteren, iv. 79; Mendoza, viii. 174, 175; Wagenaer, vad. Hist., vi. 413, 414.] On the edge of the mere the Prince of Orange had already ordered a cluster of forts to be erected, by which the command of its frozen surface was at first secured for Harlem. In the course of the siege, however, other forts were erected by Don Frederic, so that the aspect of things suffered a change. Against this immense force, nearly equal in number to that of the whole population of the city, the garrison within the walls never amounted to more than four thousand men. In the beginning it was much less numerous. The same circumstances, however, which assisted the initiatory operations of Don Frederic, were of advantage to the Harlemers. A dense frozen fog hung continually over the surface of the lake. Covered by this curtain, large supplies of men, provisions, and ammunition were daily introduced into the city, notwithstanding all the efforts of the besieging force. Sledges skimming over the ice, men, women, and even children, moving on their skates as swiftly as the wind, all brought their contributions in the course of the short dark days and long nights of December, in which the wintry siege was opened.