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Related to Immemorial: since time immemorial

IMMEMORIAL. That which commences beyond the time of memory. Vide Memory, time of.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in classic literature ?
Before Tarzan came upon his first visit, La had had no thought that such men as he existed, for she knew only her hideous little priests and the bulls of the tribe of great anthropoids that had dwelt from time immemorial in and about Opar, until they had come to be looked upon almost as equals by the Oparians.
If I was to translate this into Latin, I should render it by these two words, Nolo Episcopari : a phrase likewise of immemorial use on another occasion.
The servants said they would follow the fashion, a fashion grown sacred through immemorial observ- ance; they would scatter fresh rushes in all the rooms and halls, and then the evidence of the aristocratic visitation would be no longer visible.
I closed up alongside of a burly fellow with a fat good-humored face, purposing to make myself agree- able and pick up some further crumbs of fact; but I had hardly more than scraped acquaintance with him when he began eagerly and awkwardly to lead up, in the immemorial way, to that same old anecdote -- the one Sir Dinadan told me, what time I got into trouble with Sir Sagramor and was challenged of him on ac- count of it.
"This dark old square of canvas, my fair cousin," said he, "has been an heirloom in the Province House from time immemorial. As to the painter, I can tell you nothing; but, if half the stories told of it be true, not one of the great Italian masters has ever produced so marvellous a piece of work as that before you."
It seemed as if the picture, while hidden behind the cloud of immemorial years, had been all the time acquiring an intenser depth and darkness of expression, till now it gloomed forth again, and threw its evil omen over the present hour.
In vain the doors of the upper entry had been locked; the ghost either carried a duplicate key in its pocket, or availed itself of a ghost's immemorial privilege of coming through the keyhole, and promenaded as before, with a freedom that was alarming.
I said secretly, because the Fairy had warned the Queen that the King was a magician; and as from time immemorial there had been a standing feud between the Fairies and the Wizards, he might not have approved of his wife's visit.
'Even though in this country we do not recognise that religious belief, but it has existed since time immemorial,' he added.
In 1989, it said it "recognises the fact that from times immemorial cow protection has remained one of the basic tenets of Indian culture and it is on the patient back of the cow and its progeny that the entire structure of the Indian agriculture rests." It had promised a total ban on the cow slaughter, ensuring that no one has a fundamental right of trade or business to slaughter cows.
Sharon, a mother of one, took issue with the fact that women have been looked down upon since time immemorial.
3 Varian tries again with Immemorial Roger Varian saddles his lowest-ever ranked runner in the shape of the 27-rated Time Immemorial, who takes on Albert Finney, rated 45lb higher, and five others in the finale at Wolverhampton (8.15).