A Shadowed Love by Fred M. White

Gay was making himself quite at home. There was no trouble about the servants. They had merely been informed that their master's brother had arrived unexpectedly, and there was an end of it. As to the secret of the household, Kant was the only one of the domestics who knew anything, and the striking resemblance between Gay and his unhappy host was too apparent to cause speculation.

There was no trouble about wardrobe, seeing that the brothers were so alike in figure as well as face. As Stephen appeared when he came down to breakfast the following morning he might have been fresh from the hands of a Bond street tailor. His grey lounge suit fitted him to perfection, his linen was glossy and immaculate, he approved of his host's razor.