Scattered over Europe are found numbers of mysterious monuments of the past. Some of them we have mentioned already as the embankments surrounding ancient villages. But aside from these are other monuments, such as burial mounds, rude dolmens, and great standing stones, sometimes arranged in circles, sometimes in rows, and sometimes standing singly. Many of these remains may be of a far later date than the Neolithic Age, still it is extremely difficult to draw a dividing line between the monuments of different ages. Chambered Burial Ground, Denmark. Dolmen, England. Burial mounds are found everywhere, many in Europe going back to the Neolithic Age, though some are of a very recent construction. The Egyptian Pyramids are burial mounds on the grandest scale. The first cut represents a Danish Tumulus, or burial mound, of this Age. The openings lead to the center of the mound, where they connect with chambers in which the bodies were formerly placed. There are, of course, various modifications of this tumulus. Often the gallery was omitted, a rude chamber was erected, and a mound reared over it. Sometimes, indeed, no chamber was made, but simply a mound placed over the body. Dolmen, France. Dolmen, once covered with Earth. There have been found in England a great many stones arranged as in the preceding cut, though generally not built with such regularity as is there represented. They are named Dolmens, a word meaning stone tables. They were more generally made of rough stones, rudely arranged. This cut represents one found in France. In early times these were supposed to have been rude altars used by the mysterious Druids in celebrating their rites. They are now known to be the tombs of the Neolithic Age. They are, in fact, the chambers above mentioned. The mound of earth has since disappeared and left its chamber standing exposed to the air. Traces of the old passage way are still met. Whether all Dolmens were once covered with earth or not, is not yet known. In the majority of cases they probably were. In the last cut portions of stone are still buried in the earth. We are told that in India the people in some places still erect Dolmens similar to those of Neolithic times.32 Menhir. Stone Circle, England.