...They move slowly and languidly; the ordinary piercing and dominant English enunciation has fallen to modulation; their eyes, while observant and alert, look tired... 
Stewart Edward White 「African Camp Fires」
...He was very observant...
W. E. B. Du Bois 「The Quest of the Silver Fleece」
...Blanche Leary, closely observant of Tryon's moods, marked a decidedchange in his manner after his return from his trip to Patesville...
Charles W. Chesnutt 「The House Behind the Cedars」
...His observant criticismfor once failed him...
Various 「Ainslee's magazine, Volume 16, No. 2, September, 1905」
..." The reason for this, no doubt, is that people are not as a rule observant, and even if they notice a creature one moment they probably forget all about it the next...
Edward Saunders 「Wild Bees, Wasps and Ants」
...was so observant,that the remark he made during his troubles is on record, and strictlyjust as applicable to the instinctive fidelity of the animal...
Edward Jesse 「Anecdotes of Dogs」
...It would tend to make him quick in thewater, and observant...
Dinks, Mayhew, and Hutchinson 「The Dog」
...In the well-known American Morgan, theswiftest and strongest of our harnessed forms, the observant eyedetects indications of this masterful blood...
Nathaniel Southgate Shaler 「Domesticated Animals」
... quietly observant...
George Manville Fenn 「Dead Man's Land」
...For them he was a hunter, sly,silent, crafty, stalking his game by approved still-hunting methods; forhimself he was the true fisherman, quiet, observant, endlessly patient...
William J. Long 「Wood Folk at School」
...This nativewas taciturn and observant of such natural circumstances, to a degree thatmade his opinion of value in doubtful cases...
Thomas Mitchell 「Journal of an Expedition into the Interior of Tropical Australia」
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