The closest observers report the physical traits of the Eskimos as thoroughly American and not Asian, as has sometimes been alleged.[65] In appearance the Innuits of pure blood are of medium or slightly undersize, color dark, nose prominent and sometimes aquiline, hair dark brown or black, moderately strong on the face, the pubes and in the axilla; the eyes are dark brown and occasionally blue. The skull is generally long (dolichocephalic), but is subject to extensive variations ranging from almost globular to exceptionally long and narrow specimens.[66] In spite of the hardships of their life, the Innuits are of a singularly placid and cheerful temperament, good-natured among themselves and much given to mirth and laughter.[67] The ingenuity with which they have learned to overcome the difficulties of their situation is quite surprising. In a country without wood or water, frightfully cold, and yielding no manner of edible fruit or vegetable, they manage to live and thrive. Their principal nurriture is the product of the sea. They build boats called _kayaks_ or _bidarkas_ from the bones of walrus covered with the skins of seals; their winter houses are of blocks of snow laid up on the principle of the circular arch to form a dome, with windows of sheets of ice. These they warm by means of stone lamps fed with blubber oil. Their clothing is of bird skins and furs, and they are skilled in the preparation of a sort of leather. As faithful companions they have their dogs, intelligent animals, used both in hunting and for drawing small sledges built of wood or bone. With their tools of bone or stone they fashion many curious and useful articles, displaying a marked inventive faculty and an artistic eye. The picture-writing which they devised for the assistance of their memory is greatly superior to any found north of Mexico in the faithful delineation of objects, especially of animal forms.[68] The long winter nights are enlivened by music and songs, of which they are passionately fond, and by the recital of imaginative tales, the stock of which is inexhaustible. A skillful bard enjoys a wide reputation, and some of their poems contain fine and delicate sentiments.[69] Others are from ancient date, and are passed down from generation to generation with scrupulous fidelity, every tone, every gesture, being imitated. The meter and rendition of their songs seem to the European monotonous, but the Eskimo has his own notion of the music of verse, and it is a very advanced one; he would have it akin to the sweet sounds of nature, and for that reason their poets sleep by the sound of running water that they may catch its mysterious notes, and model on them their own productions.[70] These songs also serve as a peaceful means to allay feuds. When two persons quarrel, they will appoint an evening and sing “nith songs” at each other, and the audience will decide which comes out best. This verdict will put an end to the ill-feeling.