| Quote | Category | Chapter | Notes | Queries |
| Herefordshire | non-London location | 3 | County in west of England; due E of South Wales | Now called Hereford & Worcester? |
| Bath | non-London location | 3 | society watering hole in west England | |
| Tunbridge Wells | non-London location | 3 | SE of London in Kent. Royal Tunbridge Wells today is a "graceful combination of Georgiana and Victoriana amid parks, vistas and with a vast semi-wild common." Its mineral springs were discovered in 1606 by Lord North. Charles II's mother Queen Henrietta Maria spent six weeks there after his birth. | |
| Baluchistan | non-London location | 6 | Part of modern Pakistan; controlled by British from late 1800's until partition and independence of India/Pakistan in 1947. In the west, bordering on Iran. | |
| Newmarket | non-London location | 8 | Roughly 70 miles NE of London in Suffolk;site of famous horse races. Now home to the National Horse Racing Museum. | |
| Cheveley | non-London location | 9 | ||
| Margate | non-London location | 9 | ||
| Ramsgate | non-London location | 9 | ||
| Ross | non-London location | 9 | Ross-on-Wye, in the Wye Valley in Herefordshire. According to Michelin, this area "has been popular since the late 18C and early 19C when it became one of the resorts of connoisseurs of Romantic scenery." | |
| Hereford | non-London location | 9 | Capital city of the county of Hereford. Was capital of Saxon Mercia prior to the Norman Conquest. Hereford Cathedral is home of the Mappa Mundi. | Does the Mappa Mundi figure in another of GH's books? It sounds familiar |
| Hampton Court | non-London location | 13 | Tudor palace of Henry VIII, on the Thames 20 miles upstream from central London. Originally built by Cardinal Wolsey but granted to Henry VIII, who resented the grandeur kept by the Cardinal. | real business near Hampton Court? |
| Star and Garter | non-London location | 13 | ||
| the Shires | non-London location | 16 | ||
| Barkby Holt | non-London location | 16 | ||
| the Whissendine | non-London location | 16 | ||
| Moulsey Hurst | non-London location | 17 | ||
| Copthall Common | non-London location | 17 | ||
| Watford | non-London location | 19 | Within 20 miles of central London; one terminus of the Metropolitan Line of the Tube is at Watford. | |
| Stanmore | non-London location | 20 | Now, northern terminus of Jubilee Line of the Tube. | Then? |
| Berkhamsted | non-London location | 20 | ||
| Essex Arms | non-London location | 20 | real place of business? | |
| King's Langley | non-London location | 20 | ||
| Clipperfield | non-London location | 20 | ||
| Wells | non-London location | 21 | Where Harry went to the races, and was therefore absent when Felix's accident occurred. "England's smallest cathedral city." Cathedral was built from 1175 to 1508, taking more than three centuries. In county of Somerset in the West of England. | Information about Wells races? |
| the Sun | non-London location | 22 | real business in Hemel Hempstead? | |
| Hemel Hempstead | non-London location | 22 | Appears to be about 10 m N of Watford in Hertfordshire. | |
| Hertfordshire | non-London location | 23 | Country just NW of London | |
| Edgware | non-London location | 24 | I assume this was a small town on the northern outskirts of Regency London. It is now the terminus of Northern Line of the Tube, in Hertfordshire. | |
| Somerset | non-London location | 26 | Location of Alver, the Marquis' principal seat. County in SW of England, SW of the county of Avon. |
