"Ancient Monuments," p. 117. Note.--For the statement made
in this text we are under obligation to Prof. Thomas, of the
Bureau of Ethnology, who, in answer to a letter of inquiry,
kindly furnished the information.
(40) _"Am. Antiquarian,"_ March, 1884, p. 99.
(41) It may be that no mounds were built for signaling purposes
alone. The work of erecting mounds was so great that it is quite
likely they were always erected for some other purpose, and used
only secondarily for signal purposes. Such is shown to be the
case with many of the signal mounds in Ohio. Such is the opinion
of Mr. MacLean, who has made extensive researches.
(42) Force's "Some Consideration of the Mound Builders," p. 65.
(43) Similar effigy mounds have been recently observed in
Minnesota, but they have not yet been described. (Putnam.)
(44) Peet's _American Antiquarian,_ May, 1884, p. 184.
(45) Peet's _American Antiquarian,_ January, 1884. We are
indebted to the writings of Mr. Peet in this periodical for the
months of January, May, and July, 1884, for many interesting
facts in reference to the effigy mounds. He has studied them
more than any other person, and his conclusions are consequently
of great value.
(46) Peet's "Emblematic Mounds and Totem System of the Indian
Tribes."
(47) "Ancient Monuments," p. 40.
(48) _American Antiquarian,_ January, 1883.
(49) Putnam, in "Proceedings of American Antiquarian Society,"
1884.
(50) Peet's "Emblematic Mounds and Totem System of the Indian
Tribes."
(51) Abbott's "Primitive Industry," p. 383.
(52) Peet's "Military Architecture of the Emblematic Mound
Builders."
(53) "Smithsonian Report," 1877, p. 278, _et seq._
(54) "Ancient Monuments," p. 97; _American Antiquarian,_
January, 1883, p. 77.
(55) This information is communicated by Mr. L. N. Tower, a
gentleman in the employ of C. & N. W. E. R., at Tracy, Minn.,
who, at the request of the writer visited this locality, made
measurements, etc.
(56) _American Antiquarian,_ November, 1884, p. 403.
(57) The dimensions of this figure vary. Mr. MacLean's survey
makes the entire length of the serpent part eleven hundred and
sixteen feet; the distance between the extended jaws, one
hundred feet. The oval figure is one hundred and thirteen feet
long by f