The Crow's Inn tragedy

The offices of Messrs. Bechcombe and Turner took up the whole of the first floor of the corner house of Crow's Inn Square. Bechcombe and Turner was one of the oldest legal firms in London. Their offices were dingy, not to say grimy-looking. The doors and windows had evidently not had a coat of paint for years. There were no lifts in Crow's Inn. Any such modern innovation would have been out of place in the tall, narrow-casemented houses that stood square round the grass-grass which was bound and crossed by stone flagged walks.
The front door of the corner house stood open; the tessellated floor of the hall was dulled by the passing of numberless footsteps. The narrow, uncarpeted stairs went up just opposite the door. A tall, grey-haired clergyman, who was carefully scrutinizing the almost illegible doorplate, glanced round in some distaste as he went up the worn stairs. At the top he was faced by a door with the legend "Inquiries" written large upon it.
After a moment's hesitation he knocked loudly. Instantly a panel in the middle of the door shot aside and a small, curiously wrinkled face looked out inquisitively.