J. G. Wood, The uncivilized races of men in all countries of the world… (1875)
“ Men who have been fortunate enough to kill an elephant, and rich enough to be able to use part of the tusks for their own purposes, generally cut off a foot or so from the base of each tusk for the purpose of making armlets, at once trophies of their valor and proofs of their wealth. The reader is perhaps aware that the tusk of an elephant, though hard and solid at the point, is soft at the base, and has only a mere shell of hard ivory, the interior being filled with the soft vascular substance by which the tusk is continually lengthened and enlarged. ”
