Gilling Abbey [Map] was founded by King Oswiu of Northumbria (age 39) at the request of his wife Eanflæd Queen Consort Bernicia (age 24) at the site where Oswiu (age 39) had killed a rival and kinsman, King Oswine of Deira, Eanflæd's (age 24) second cousin, the cost being compensation for his death.
The abbey's first abbot was a relative of King Oswine: Bishop Trumhere.
The abbey's second abbot was Abbot Cynefrith.
The abbey's third abbot was Trumbert.
Bede. 678. In the year of our Lord's incarnation 678, which is the eighth of the reign of Egfrid (age 33), in the month of August, appeared a star, called a comet, which continued for three months, rising in the morning, and darting out, as it were, a pillar of radiant flame. The same year a dissension broke out between King Egfrid (age 33) and the most reverend prelate, Wilfrid, who was driven from his see, and two bishops substituted in his stead, to preside over the nation of the Northumbrians, namely, Bosa, to preside over the nation of the Deiri; and Eata over that of the Bernicians; the latter having his see in the city of York [Map], the former in the church of Hagulstad [Map], or else Lindisfarne [Map]; both of them promoted to the episcopal dignity from a society of monks. With them also was Edhed ordained bishop in the province of Lindsey, which King Egfrid (age 33) had but newly subdued, having overcome and vanquished Wulfhere; and this was the first bishop of its own which tliat province had; the second was Ethelwin; the third Eadgar; the fourth Cynebert, who is there at present. Before Edhed, Sexwulf was bishop as well of that province, as of the Mercians and Midland Angles; so that when expelled from Lindsey, he continued in the government of those provinces. Edhed, Bosa, and Eata, were ordained at York [Map] by Archbishop Theodore (age 76); who also, three years after the departure of Wilfrid, added two bishops to their number; Trumbert, in the church of Hagulstad [Map], Eata still continuing in that of Lindisfarne; and Trumwine in the province of the Picts, which at that time was subject to the English. Edhed returning from Lindsey, because Ethelred had recovered that province, was placed by him over the church of Ripon.
In 681 Bishop Trumbert was consecrated Bishop of Hexham.
Anglo-Saxon Chronicle. 685. This year King Everth (age 40) commanded Cuthbert (age 51) to be consecrated a bishop; and Archbishop Theodore (age 83), on the first day of Easter, consecrated him at York Bishop of Hexham; for Trumbert had been deprived of that see. The same year Everth (age 40) was slain by the north sea, and a large army with him, on the thirteenth day before the calends of June. He continued king fifteen winters; and his brother Elfrith succeeded him in the government. Everth (age 40) was the son of Oswy. Oswy of Ethelferth, Ethelferth of Ethelric, Ethelric of Ida, Ida of Eoppa Bernicia. About this time Ceadwall (age 26) began to struggle for a kingdom. Ceadwall (age 26) was the son of Cenberht Wessex, Kenbert of Cedda Wessex (age 95), Chad of Cuthwine, Cutha of Ceawlin, Ceawlin of Cynric, Cynric of Cerdic. Mull, who was afterwards consigned to the flames in Kent, was the brother of Ceadwall (age 26). The same year died King Hlothhere of Kent, King of Kent; and John was consecrated Bishop of Hexham, where he remained till Wilferth was restored, when John was translated to York on the death of Bishop Bosa. Wilferth his priest was afterwards consecrated Bishop of York, and John retired to his monastery [Map]21 in the woods of Delta. This year there was in Britain a bloody rain, and milk and butter were turned to blood.
Bede. It is no wonder that he joyfully beheld the day of his death, or rather the day of our Lord, which he had always carefully expected till it came; for notwithstanding his many merits of continence, humility, teaching, prayer, voluntary poverty, and other virtues, he was so full of the fear of God, so mindful of his last end in all his actions, that, as I was informed by one of the brothers who instructed me in divinity, and who had been bred in his monastery, and under his direction, whose name was Trumhere [Note. Probably Bishop Trumbert, possibly Bishop Trumhere], if it happened that there blew a strong gust of wind when he was reading or doing any other thing, he immediately called upon God for mercy, and begged it might be extended to all mankind. If the wind grew stronger, he closed his book, and prostrating himself on the ground, prayed still more earnestly. But, if it proved a violent storm of wind or rain, or else that the earth and air were filled with thunder and lightning, he would repair to the church, and devote himself to prayers and repeating of psalms till the weather became calm. Being asked by his followers why he did so, he answered, "Have not you read - ' The Lord also thundered in the heavens, and the Highest gave forth his voice. Yea, he sent out his arrows and scattered them; and he shot out lightnings, and discomfited them.' [Note. Psalm 18 Verses 13 and 14] For the Lord moves the air, raises the winds, darts lightning, and thunders from heaven, to excite the inhabitants of the earth to fear him; to put them in mind of the future judgment; to dispel their pride, and vanquish their boldness, by bringing into their thoughts that dreadful time, when the heavens and the earth being in a flame, he will come in the clouds, with great power and majesty, to judge the quick and the dead. Wherefore," said he, "it behoves us to answer his heavenly admonition with due fear and love; that, as often as he lifts his hand through the trembling sky, as it were to strike, but does not yet let it fall, we may immediately implore his mercy; and searching the recesses of our hearts, and cleansing the filth of our vices, we may carefully behave ourselves so as never to be struck.''