By this time, the great deeds of King Elessar had faded into distant memory, and tales of the War of the Ring lingered only as a faint shadow upon the early childhood of those few who had witnessed the end of that age.
Any struggles that followed the Dark Lord's fall would be smaller in scale, diminishing in meaning and unworthy of becoming great tales in their own right.
In a biography, Humphrey Carter records that in 1965, Tolkien came across a typescript of The New Shadow and sat contemplating it until 4:00 in the morning.
Christopher Tolkien adds further weight to this revelation in The Peoples of Middle-earth, where he wrote that he discovered a used envelope amongst his late father's possessions.