Born 28th February 1830. He died 4th September 1884 S.P. and was buried at Whitton, Middlesex.

He married Frances Mary daughter of John Acton of Ludlow. He was in the literary department of the British Museum, where he specialised in work concerning Icelandic Sagas, having learnt the language. As mentioned before, he wrote our history for M'Kerlie's book, which shows his trained ability in the great deal he salved and recorded, for which a landless and scattered family should be grateful. Unfortunately he knew and discovered little about the branch which went to Ireland and which alone persists. Attention was called to this in the Galloway Press at the time, but to balance this the Lidderdale-Forrests have inherited his papers. This has been appreciated elsewhere in a short account of that family.

On the walls of the family burial enclosure in Galtway Kirkyard are tablets to the memory of the following members of the family mostly buried there.
- THOMAS youngest son of John Lidderdale of Castle Milk, Dumfries, who died at Ambergis Bay [Ambergris Cay] of Honduras, 28th December 1777 [should be 1799] aged 39.
- THOMAS ROBERTSON who died at Appleby, Westmorland, 15th May 1852, aged 67 and his only surviving son.
- THOMAS WILLIAM who died on his way to the British Museum Library where he was on the staff, his death taking place in a chemist's shop on 4th September 1884, when he was 54.

Source: Robert Halliday Lidderdale, An Account of the Lowland Scots Family of Lidderdale, 1950.

The St. Phillip and St. James Church (http:www.whitton-church.org.uk/history2.html), built in Whitton, Middlesex in 1862, has the following dedication on the base of its Lectern:

"To the Glory of God in loving memory of Thomas William Lidderdale, Easter 1886."

Extract from M. McL., Harper, Rambles in Galloway, Chapter 6 - Dundrennan to Kirkcudbright, 1876 (http://www.old-kirkcudbright.net/rambles/rambles1.htm).

The present representative of the Lidderdales is thus Thomas William of the Literary Department, British Museum. He married, 22nd January 1862, Frances Maria, daughter of John Acton of Ludlow, Salop.

Arms - Azure, a chevron ermine, quartering those of Robertson.
Crest - An eagle's head, erased, proper.
Motto - Foresight is all.

Extract from the Will of John Haliburton, of Preston in the County of Lancaster, who died on March 25, 1856 (In Her Majestys Court of Probate, The Principle Registry 1873). Courtesy of Robert Burn, United Kingdom.

Administrator descriptions: Thomas William Lidderdale of no. 13 Malvern Villas Hounslow in the County of Middlesex and Azile Eleanor Lidderdale of no. 13 Malvern Villas aforesaid spinster.