[2] The Victoria County History for Leicestershire suggests that Grandmesnil founded Groby Castle,[1] as does the English Heritage Archive.

[10] Antiquarian William Burton noted in the early 17th century that Groby Castle "was utterly ruinated and gone and only the mounts, rampires and trenches were to be seen".

[11] A fragment of one wall remains, together with earthworks consisting of a large mound of earth at the rear of the present manor house known as Groby Old Hall.

[13] Groby Castle is a Scheduled Monument,[3] which means it is a "nationally important" historic building and archaeological site which has been given protection against unauthorised change.

The stately home, with an ancient tree growing in the grounds half the height of an even deeper well, is supposedly located in the North Riding of Yorkshire.