A trifle darker it was there, and there was a certain sullen glow discernible only to eyes trained to read the sky for warning signals of snow, fire, and flood.
"Lonesome Land"
B. M. Bower
There was no discernible line of demarcation to indicate separate fields, and it was quite impossible to determine whether we were on land or sea ice.
"My Attainment of the Pole"
Frederick A. Cook
But the young man did see something-a dull glow was discernible in the sky, apparently a great distance away.
"The Man from Jericho"
Edwin Carlile Litsey