She was the fifth child of George and Christian Grey.
She was engaged to Drever Joicey in 1915. He died in a hunting accident before they could be married and the Joiceys built her a house. She never married. She became commandant of Etal Manor VAD convalescent hospital for three years and was awarded the OBE in 1918.
The Joiceys gave her Flodden Edge Farm to live in during her life. She kept goats in her old age and was considered by her great nephews and nieces as rather formidable.

Mary Lizette Grey.

Born 16 February 1887 at Milfield Hill.

Died 18 January.

 

" The Hon. Drever Joicey, of Howtel, Mindrum, who died 27th of January last, aged 28 years, youngest son of Lord Joicey of Ford Castle, left unsettled property of the gross value of £61,887 13s 11d, of which the net personalty amounts to £58, 512 6s 1d. Probate of his will dated 9th January last, has been granted to Mr Eric Ida Grey, land agent of Milfield, and Mr. Robert Watson Cooper, solicitor, of 18, Market Street, Newcastle. The testator left £500 to Eric Ida Grey, all the farm stock and implements on his farm at Howtel, and an annuity of $500 to Mary Lisette Grey, all the jewellery received from his late mother to his sister Marguerite de Fontaine Drevor Joicey, absolutely, and the residue of his property on trust to his said sister for life, with remainder to her issue as she may appoint, or equally, whom failing, to his nephews and nieces then living, in equal shares, whom failing, as his said sister may otherwise appoint".

Probate records say that he died three weeks after their engagement was announced on 27 January 1915 at 20 Dorset Square, London, and probate was granted in May.

 

The Newcastle Journal, 2 February 1918: "Maintenance of Hospitals, Ladies' Services Acknowledged by the State.Miss Mary Lizette Grey, 13th Northumberland V. A. Hospital, Etal Manor."