John Buchan 
Huntingtower [EPUB ebook] 

The girl came into the room with a darting movement like a swallow, looked round her with the same birdlike quickness, and then ran across the polished floor to where a young man sat on a sofa with one leg laid along it.
‘I have saved you this dance, Quentin, ‘ she said, pronouncing the name with a pretty staccato. ‘You must be lonely not dancing, so I will sit with you. What shall we talk about?’
The young man did not answer at once, for his gaze was held by her face. He had never dreamed that the gawky and rather plain little girl whom he had romped with long ago in Paris would grow into such a being. The clean delicate lines of her figure, the exquisite pure colouring of hair and skin, the charming young arrogance of the eyes-this was beauty, he reflected, a miracle, a revelation. Her virginal fineness and her dress, which was the tint of pale fire, gave her the air of a creature of ice and flame.