It was impossible for any man not to know the colour of Elfride's hair. In women who wear it plainly such a feature may be overlooked by men not given to ocular intentness. But hers was always in the way.
Yet sometimes, in the pauses of his work, the young man frowned and looked at the ground with an intentness which suggested that even twenty-one might have its problems.
Then he advanced warily toward the machine-monster, which had paused and seemed to be regarding him with sinister intentness through its glistening crystal eye-lenses.