A Shadowed Love by Fred M. White

Von Wrangel had flung down his instrument in a passionate rage. He was occasionally given to childish fits of anger of that kind, as men with the artistic temperament often are. Not that he had absolutely failed; indeed, so far as he had gone, he had no reason to be dissatisfied with the result of his experiment.

But a sheer accident had deprived him of the chance of finishing it. Also he had positively promised Mary that she should see as well as anybody else again. And Von Wrangel shrank from giving pain outside the necessary pain that surrounds his profession.