As it is evident that the burials in this case were made at one time, and as the mortar-like substance had run into the interstices, it is more than probable that the skeletons were deposited after the flesh had been removed.
The following description of a mound with a single original and several intrusive burials is also taken from Colonel Norris' notes of work in Crawford County:
One large mound of this group, 70 feet in diameter and 10 feet high, still unexplored, was opened. It had been considerably defaced, especially on the west side. According to tradition it was a noted burial place with the Indians, which was certainly confirmed by the result. The surface or top layer was composed of sand and alluvial earth to the depth of some 3 or 4 feet. Scattered through this in almost every part of the mound were human skeletons in various stages of decay and in different positions, but mostly stretched horizontally on the back. Scattered among the remains were numerous fragments of blankets, clothing and human hair, 1 copper kettle of modern pattern, 3 copper bracelets (hammered from native copper), 1 silver locket, 10 silver bracelets (one having the name "Montreal," and another the letters "A B" stamped on it), 2 silver earrings, 6 silver brooches, 1 copper finger-ring, 1 double silver cross, 1 knife-handle, and 1 battered bullet. In fact the top layer to the depth of 3 or 4 feet seemed to be packed as full of skeletons and relics as possible.
Carrying the trench down to the original surface of the ground, he found at the bottom, near the center, a single skeleton of an adult in the last stages of decay. With it were the following articles: 2 stone scrapers, a small stone drill, fragments of river shells, and pieces of a mammoth tusk. The earth below the upper layer was mixed with clay and ashes, evidently different from the surrounding soil.
Several mounds opened by him in Grant County contained charred human bones, and one or two covered confused masses of bones, being similar in this respect to some of those heretofore mentioned.
A mound which he opened in Sheboygan County, containing a single skeleton, is described as about 50 feet in diameter and 5 feet high. After passing through 18 inches of surface soil, the central mass, composed of earth mingled with charcoal, ashes, and loose stones, was reached. Near the center of this mass, and at the bottom of the mound, a large human skeleton was discovered, apparently holding between the hands and knees a large clay vase. Immediately over this skeleton was an irregular layer of flat bowlders.
Another mound of this group, about the same size as the preceding, was found literally filled with skeletons to the depth of 2½ feet, evidently intrusive burials, as they were accompanied with iron implements, silver ornaments, etc. Beneath these was a layer of rounded drift bowlders aggregating several wagon loads. Below these and in a shallow excavation in the natural surface of the ground were some forty or more skeletons in a sitting or squatting posture, disposed in circles around and facing the central space, which was occupied by an unusually large shell (Busycon perversum).
It is worthy of notice in this connection that there are no effigy mounds, so far as known, in the immediate section where the two works just mentioned are situated, but there is near by, one small oval enclosure about 50 feet in diameter.
In studying the burial mounds of the district now under consideration, of which the foregoing may be considered as types, there appears to be no marked distinction between the intrusive burials of modern Indians and the original burials for which the mounds were constructed. In both we observe from one to many skeletons in a place; in both we find them stretched out horizontally and also folded; in both we sometimes notice evidences of fire and partially-consumed bones; in both we find instances where the mortar-like covering has been used, and in both we meet occasionally with those confused masses of bones which seem to have been gathered from graves or other temporary burial places into these mounds as common depositories. Moreover the transition from one to the other is so gradual as to leave us nothing save the position in the mound and the presence of vestiges of civilized art to distinguish the former from the latter.
