Returning, however, to the Walloons and their penetration of the Karkonosze and the Jizera Mountains (which at one time were studied even more intensively) – they inadvertently became the forerunners of leadership in this area, and even precursors of written "guides". These are the so-called Walloon books. Despite the name, they were rather loose notes and descriptions of routes and places, according to the authors, rich in ore or minerals. They appeared around the mid-15th century. One / the first – known as the Wroclaw Walloon Book – by Antonius Wale, although some believe, that Antonio Medici himself could be hiding under this name. Initially, these were descriptions of approaches, based on the characteristic signs and objects existing in the area at that time. As this literature developed (as well as increasing competition in the profession) the descriptions began to get complicated, took on the character of a cipher, understandable only to the initiated, and even intentionally disinforming, there are fairy-tale threads about hidden dungeons with treasures, the gates leading to them, guarding their secret powers, spells and counter spells, itp. Anyway, even simple descriptions are incomprehensible to the modern reader. The authors necessarily had to give their own names to the landmarks, because the mountains didn't actually have it yet – with very few exceptions, no topographical names. In the descriptions, as characteristic points, trees appear, rocks, streams. Served, that in some places they were additionally marked. The authors of works devoted to the Walloons and their books provide descriptions of such signs. Only some rock carvings have survived to our times. Of course, all signs cut on trees are long gone, and in many cases the rock ones have also become blurred or unreadable. The more famous are carvings on the Rock Table (zatarty), Rudziankach, Orla Skala in Szklarska Poręba (actually already in the Jizera Mountains) and probably the best preserved on the Walloon Stone in Złoty Widok in Przesieka. These signs were very different: the stars, moon (Sun?), crosses, pickaxes and hammers, carvings of feet and hands, finally, arrows and letters. They were supposed to indicate the way or hidden entrance to the richest places. With some imagination and good intentions, they could be considered the first tourist signs.

Intensive exploration by the Walloons lasted mainly in the 15th-16th centuries. In the 17th century. They must have already disappeared from the Karkonosze Mountains, but tales of gold prospecting, about hidden treasures and access to them stretched through the nineteenth century. and have survived almost to our times, although the traces and Walloon books themselves have survived only in descriptions and copies.

From the 15th century. miners entered the Karkonosze Mountains, glaziers, dusty, shepherds, and then the population settling in developing villages and occupying more and more areas under arable land. It resulted in intensive penetration of the surrounding areas, thus stripped of mystery and horror. Secret forces, Spirit of the Mountains, fearful sorcerers and similar phenomena and persons had to retreat deep into the mountains. The period of "civilization" of the Karkonosze had begun, which occurred here earlier and developed more intensively than in other Sudeten ranges, maybe only outside the Kłodzko region.