In White Raiment by William le Queux

On the following afternoon, in response to a telegram I had sent to Beryl, she accompanied me to Highgate to face La Gioia. Now that I had such complete evidence of her attempts to poison, I did not fear her, but was determined to elucidate the mystery. Beryl accompanied me rather reluctantly, declaring that, with such power as the woman held, our lives were not safe; but I resolved to take her by surprise, and to risk all. After leaving Hoefer I had sought an interview with the detective Bullen, and he, by appointment, was in the vicinity of the house in question, accompanied by a couple of plain-clothes subordinates.

We stopped our cab in Hampstead Lane, and descending, found that the Bishop's-wood Road was a semicircular thoroughfare of substantial detached houses, the garden of each abutting upon a cricket-ground in the centre, and each with its usual greenhouse where geraniums were potted and stored in winter. On entering the quiet, highly-respectable crescent, we were not long in discovering a house with the name "Fairmead" inscribed in gilt letters upon the gate, while a little further along my eyes caught sight of two scavengers diligently sweeping the road, and, not far away, Bullen himself was walking with his back turned towards me.