Question: The Battle of Alnwick (1174) is one of two battles fought near the town of Alnwick, in Northumberland, England, the battle, which occurred on 13 July 1174, William I of Scotland, also known as William the Lion, was captured by a small English force led by which Chief Justiciar of England during the reign of King Henry II (1154–89) and was the probable author of "Tractatus de legibus et consuetudinibus regni Anglie"?

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Nullum tempus occurrit regi: Nullum tempus occurrit regi ("no time runs against the king"), sometimes abbreviated "nullum tempus", is a common law doctrine originally expressed by Bracton in his "De legibus et consuetudinibus Angliae" in the 1250s.  It states that the crown is not subject to statutes of limitations.  This means that the crown can proceed with actions that would be barred if brought by an individual due to the passage of time.  The doctrine is still in force in common law systems today.  In republics, it is often referred to as ""nullum tempus occurrit reipublicae"".

Mac Scelling: Mac Scelling (fl.  1154–1173/1174), also known as Mac Scilling, was a prominent twelfth-century military commander engaged in conflicts throughout Ireland.  He is first recorded in 1154 commanding the maritime forces of Muirchertach Mac Lochlainn, King of Cenél nEógain in a bloody encounter against Toirrdelbach Ua Conchobair, King of Connacht.  Muirchertach's naval forces were drawn from the western peripheries of Scotland and the Isles.  He next appears on record in 1173/1174, supporting the cause of Ruaidrí Ua Conchobair, King of Connacht against the English colonisation of Mide.  An early modern Scottish source claims that a man of the same name was a bastard son of Somairle mac Gilla Brigte, King of the Isles.  If Mac Scelling was indeed related to Somairle, this relationship could cast light on the latter's conflict with Guðrøðr Óláfsson, King of the Isles, a man who appears to have opposed Muirchertach at some point in his career.  Although not termed so in contemporary sources, Mac Scelling may be regarded as an early archetype of later gallowglasses, heavily-armed Scottish mercenaries recruited by Irish rulers in centuries that followed.

Tractatus de legibus et consuetudinibus regni Anglie: Tractatus de legibus et consuetudinibus regni Anglie

William Cleghorn (Newcastle eccentric): Mr. William Cleghorn, more generally known as "Billy Conolly" was born c1777 in Alnwick, Northumberland. He served his time to be a leather breeches maker, but for many years he led a wandering life, selling the ballads and stories of Cattanach of the Seven Dials, London.  (Mr Cattanach was also a native of Alnwick.)  He is said to have been the veritable "King of the Beggers" in St. Giles's; and at one time he was kidnapped and carried to France, and exhibited as a dwarf, being very diminutive in stature.  He was liberated on complaining of his treatment to some of the authorities of a town who had come to see the English dwarf.  In his latter days he earned a livelihood by selling nuts and oranges, and was well patronised by the public.  Mr. William Cleghorn died 9 August 1860 in Alnwick, aged 83.

Ranulf de Glanvill: Ranulf de Glanvill ("alias" Glanvil, Glanville, Granville, etc., died 1190) was Chief Justiciar of England during the reign of King Henry II (1154–89) and was the probable author of "Tractatus de legibus et consuetudinibus regni Anglie" ("The Treatise on the Laws and Customs of the Kingdom of England"), the earliest treatise on the laws of England.

Battle of Alnwick (1174): The Battle of Alnwick (1174) is one of two battles fought near the town of Alnwick, in Northumberland, England.  In the battle, which occurred on 13 July 1174, William I of Scotland, also known as William the Lion, was captured by a small English force led by Ranulf de Glanvill.

William de Chesney: William de Chesney (flourished 1142–1161) was an Anglo-Norman magnate during the reign of King Stephen of England (reigned 1135–1154) and King Henry II of England (reigned 1154–1189).  Chesney was part of a large family; one of his brothers became Bishop of Lincoln and another Abbot of Evesham Abbey.  Stephen may have named him Sheriff of Oxfordshire.  Besides his administrative offices, Chesney controlled a number of royal castles, and served Stephen during some of the king's English military campaigns.  Chesney's heir was his niece, Matilda, who married Henry fitzGerold.

Battle of Alnwick (1093): The Battle of Alnwick is one of two battles fought near the town of Alnwick, in Northumberland, England.  In the battle, which occurred on 13 November 1093, Malcolm III of Scotland, also known as Malcolm Canmore, was killed together with his son Edward, by an army of knights led by Robert de Mowbray.

Becket controversy: The Becket controversy or Becket dispute was the quarrel between Thomas Becket, the Archbishop of Canterbury, and King Henry II of England, from 1163 to 1170.  The controversy culminated with Becket's murder in 1170, and was followed by Becket's canonization in 1173 and Henry's public penance at Canterbury in July 1174.

Battle of Yeavering: The Battle of Yeavering (or Battle of Geteryne) was fought in 1415 between English and Scottish forces near Yeavering in Northumberland.  A small English force consisting of 440 men led by the Earl of Westmoreland defeated 4000 Scots.  Fought in the same year as the Battle of Agincourt, which famously demonstrated the efficacy of the longbow against cavalry, it is notable that the English side at Yeavering consisted mostly of archers.

Supporting paragraphs: Battle of Alnwick (1174) Ranulf de Glanvill
Answer: Ranulf de Glanvill