Aodh or Hugh, the fair-haired, succeeded his brother Constantine. His reign was unfortunate, short, and troublesome. Grig, who was Maormor, or chief, of the country between the Dee and the Spey, having become a competitor for the crown, Aodh endeavoured to put him down, but did not succeed; and having been wounded in a battle fought at Strathallan, (or possibly Strathdon,) he was carried to Inverurie, where he died, after lingering two months, having held the sceptre only one year.

Grig now assumed the crown, and, either to secure his possession, or from some other motive, he associated with him in the government Eocha, son of Ku, the British king of Strathclyde, and the grandson, by a daughter, of Kenneth Macalpin. After a reign of eleven years, both Eocha and Grig were forced to abdicate, and gave way to Donald IV., who succeeded them in 893.

During his reign the kingdom was infested by the piratical incursions of the Danes. Although they were defeated by Donald in a bloody action at Collin, said to be on the Tay, near Scone, they returned under Ivar O’Ivar, from Ireland, in the year 904, but were gallantly repulsed, and their leader killed in a threatened attack on Forteviot, by Donald, who unfortunately also perished, after a reign of eleven years. In his reign the kings of present Scotland are no longer called reges Pictorum by the Irish Annalists, but Ri Alban, or kings of Alban; and in the Pictish Chronicle Pictavia gives place to Albania.

Constantine III., the son of Aodh, a prince of a warlike and enterprising character, next followed. He had to sustain, during an unusually long reign, the repeated attacks of the Danes. In one invasion they plundered Dunkeld, and in 908, they attempted to obtain the grand object of their designs, the possession of Forteviot in Strathearn, the Pictish capital; but in this design they were again defeated, and forced to abandon the country. The Danes remained quiet for a few years, but in 918 their fleet entered the Clyde, from Ireland, under the command of Reginald, where they were attacked by the Scots in conjunction with the Northern Saxons, whom the ties of common safety had now united for mutual defence. Reginald is said to have drawn up his Danes in four divisions; the first headed by Godfrey O’Ivar; the second by Earls; the third by Chieftains; and the fourth by Reginald himself, as a reserve. The Scots, with Constantine at their head, made a furious attack on the first three divisions, which they forced to retire. Reginald’s reserve not being available to turn the scale of victory against the Scots, the Danes retreated during the night, and embarked on board their fleet.

After this defeat of the Danes, Constantine enjoyed many years’ repose. A long grudge had existed between him and Æthelstane, son of Edward, the elder, which at last came to an open rupture. Having formed an alliance with several princes, and particularly with Anlof, king of Dublin as well as of Northumberland, and son-in-law of Constantine, the latter collected a large fleet in the year 937, with which he entered the Humber. The hope of plunder had attracted many of the Vikingr to Constantine’s standard, and the sceptre of Æthelstane seemed now to tremble in his hand. But that monarch was fully prepared for the dangers with which he was threatened, and resolved to meet his enemies in battle. After a long, bloody, and obstinate contest at Brunanburg, near the southern shore of the Humber, victory declared for Æthelstane. Prodigies of valour were displayed on both sides, especially by Turketel, the Chancellor of England; by Anlof, and by the son of Constantine, who lost his life. The confederates, after sustaining a heavy loss, sought for safety in their ships. This, and after misfortunes, possibly disgusted Constantine with the vanities of this world, for, in the fortieth year of his reign, he put into practice a resolution which he had formed of resigning his crown and embracing a monastic life. He became Abbot of the Monastery of St. Andrews in 943, and thus ended a long and chequered, but vigorous, and, on the whole, successful reign in a cloister, like Charles V. Towards the end of this reign the term Scotland was applied to this kingdom by the Saxons, a term which before had been given by them to Ireland. Constantine died in 952.

Malcolm I., the son of Donald IV., obtained the abdicated throne. He was a prince of great abilities and prudence, and Edmund of England courted his alliance by ceding Cumbria, then consisting of Cumberland and part of Westmoreland, to him, in the year 945, on condition that he would defend that northern county, and become the ally of Edmund. Edred, the brother and successor of Edmund, accordingly applied for, and obtained the aid of Malcolm against Anlaf, king of Northumberland, whose country, according to the barbarous practice of the times, he wasted, and carried off the people with their cattle. Malcolm, after putting down an insurrection of the Moray-men under Cellach, their Maormor, or chief, whom he slew, was sometime thereafter slain, as is supposed, at Ulurn or Auldearn in Moray, by one of these men, in revenge for the death of his chief.

Indulph, the son of Constantine III., succeeded the murdered monarch in the year 953. He sustained many severe conflicts with the Danes, and ultimately lost his life in 961, after a reign of eight years, in a successful action with these pirates, on the moor which lies to the westward of Cullen.

Duff, the son of Malcolm I., now mounted the throne; but Culen, the son of Indulf, laid claim to the sceptre which his father had wielded. The parties met at Drum Crup (probably Crieff), and, after a doubtful struggle, in which Doncha, the Abbot of Dunkeld, and Dubdou, the Maormor of Athole, the partisans of Culen, lost their lives, victory declared for Duff. But this triumph was of short duration, for Duff was afterwards obliged to retreat from Forteviot into the north, and was assassinated at Forres in the year 965, after a brief and unhappy reign of four years and a half.

Culen, the son of Indulf, succeeded, as a matter of course, to the crown of Duff, which he stained by his vices. He and his brother Eocha were slain in Lothian, in an action with the Britons of Strathclyde in 970, after an inglorious reign of four years and a half. During his reign Edinburgh was captured from the English, this being the first known step in the progress of the gradual extension of the Scottish kingdom between the Forth and the Tweed.[110]

Kenneth III., son of Malcolm I., and brother of Duff, succeeded Culen the same year. He waged a successful war against the Britons of Strathclyde, and annexed their territories to his kingdom. During his reign the Danes meditated an attack upon Forteviot, or Dunkeld, for the purposes of plunder, and, with this view, they sailed up the Tay with a numerous fleet. Kenneth does not appear to have been fully prepared, being probably not aware of the intentions of the enemy; but collecting as many of his chiefs and their followers as the spur of the occasion would allow, he met the Danes at Luncarty, in the vicinity of Perth. Malcolm, the Tanist, prince of Cumberland, it is said, commanded the right wing of the Scottish army; Duncan, the Maormor of Athole, had the charge of the left: and Kenneth, the king, commanded the centre. The Danes with their battle-axes made dreadful havoc, and compelled the Scottish army to give way; but the latter was rallied by the famous Hay, the traditional ancestor of the Kinnoul family, and finally repulsed the Danes, who, as usual, fled to their ships. Burton thinks the battle of Luncarty “a recent invention.”