THE AVENUE, HATFIELD PARK.
In every way the grounds that surround Hatfield House are worthy of the Marquis of Salisbury's splendid mansion, and that is saying a great deal. One of the chief features of the Park is the noble avenue of trees, of which a picture is given above; and a grand old oak is pointed out as having marked the boundary within which the Princess Elizabeth was restricted, when virtually imprisoned here. Hatfield is easily accessible from London-it is within ten miles of King's Cross-and it is not surprising that the Park should be a very popular resort ; but the objectionable behaviour of injudicious picnic parties has rendered necessary the imposition of certain regulations as to the admission of the public.
source: The Queen's London : a Pictorial and Descriptive Record of the Streets, Buildings, Parks and Scenery of the Great Metropolis, 1896