Anna Katharine Green 
The Circular Study [EPUB ebook] 

Excerpt:
‘Mr. Gryce was melancholy. He had attained that period in life when the spirits flag and enthusiasm needs a constant spur, and of late there had been a lack of special excitement, and he felt dull and superannuated. He was even contemplating resigning his position on the force and retiring to the little farm he had bought for himself in Westchester; and this in itself did not tend to cheerfulness, for he was one to whom action was a necessity and the exercise of his mental faculties more inspiring than any possible advantage which might accrue to him from their use.’