The First Men believed that a man who passes sentence should swing the blade. (I: 14)
The barrows of the First Men are spread throughout the North (I: 93)
The First Men used runes, which they carved on rocks and into metal, but these are not sufficient to illuminate their history (I: 246. IV: 80)
Some 12,000 years ago the First Men arrived from the east by crossing the Broken Arm of Dorne before it was broken. They came with bronze swords and great leather shields and they rode horses (I: 617)
No horse had ever been seen on the continent of Westeros before the coming of the First Men (I: 617)
As the First Men built farms and holdfasts, they cut down the carved weirwoods and burned them. The children went to war because of this (I: 617)
The wars between the children and the First Men went on, in the favor of the larger, stronger, and more technologically advanced First Men, until the wise men of both races forged the Pact at the Isle of Faces (I: 617)
The Pact gave the coasts, high plains, meadows, mountains, and bogs to the First Men. In turn, they gave the children the forests and promised to cut down no more weirwoods (I: 617)
The Pact began 4,000 years of friendship between the children and the First Men. Eventually the First Men put aside the old gods they brought with them from east across the sea, and took up those of the children of the forest (I: 617)
The Pact ended the Dawn Age and began the Age of Heroes (I: 617)
The Pact endured through the Age of Heroes, the Long Night, and the birth of the Seven Kingdoms. Yet centuries later other peoples began to arrive in the land (I: 618)
The wars between the First Men and the Andals lasted hundreds of years, but eventually the six southron realms fell to them. Only the Kings of Winter remained in the North (I: 618)
The First Men built the Wall (I: 654)
The First Men believed that the greenseers of the children of the forest could see through the eyes of the carved weirwoods, which is why they cut down the trees when they warred upon them (II: 323)
The Fist of the First Men is a hill beyond the Wall that juts above a dense tangle of forest. Its windswept heights are visible from miles away. It is an ancient ringfort used by the First Men in the Dawn Age (II: 371)
For some reason, a direwolf warg refuses to enter the enclosure of the Fist, but domesticated animals such as a raven and horses don't object (but later caged ravens show disquiet) (II: 372, 374)
Syggerik means "deceiver" in the language of the First Men, which the giants still speak (II: 544)
Magnar means lord in the Old Tongue (III: 80)
The laws of hospitality are as old as the First Men. The guest right protects a guest who has eaten his host's food from harm, at least for the length of the stay (III: 83)
The Old Tongue is a harsh, clanging language (III: 167)
There are songs in the Old Tongue among the wildlings, and they make for strange and wild music (III: 172)
The green men, the guardians of the Isle of Faces, are said to have dark green skin and leaves instead of hair, and sometimes they have antlers as well (III: 283)
Tristifer, the Fourth of his Name, King of the Rivers and the Hills, ruled from the Trident to the Neck thousands of years before Jenny of Oldstones and her prince, in the days when the kingdoms of the First Men were falling one after the other before the Andals. He was called the Hammer of Justice, and the singers say that he fought a hundred battles and won nine-and-ninety. When he raised his castle, now a ruin known only as Oldstones, it was the strongest in Westeros (III: 520)
Tristifer IV was killed in his hundredth battle, when seven Andal kings joined forces against him. His son, Tristifer V, was not his equal, and soon the realm was lost, and the castle, and then the line. With Tristifer V died the First Men line of House Mudd, that had ruled the riverlands for a thousand years before the Andals came (III: 520. SSM: 1)
The most proper way of receiving the guest right is to eat bread and salt (III: 556, 562)
Legend says that King Sherrit called down his curse on the Andals at the Nightfort on the Wall (III: 624)
The Fingers were one of the places where the Andals first landed, to wrest the Vale from the First Men (III: 770)
In ancient days, wrongful deaths could be addressed by the paying of a blood price, and in the Age of Heroes a man's life might be reckoned at being worth no more than a sack of silver (TSS: 104, 126)
The Darklyns were petty kings before the Andals came, during the Age of Heroes (IV: 133)
The blood of the First Men runs strong in Crackclaw Point, as the inhabitants fought off the Andals but eventually accepted Andal brides (IV: 282)
Legends claim that the Winged Knight, Ser Artys Arryn, drove the First Men from the Vale and fle to the top of the Giant’s Lance on a huge falcon to slay the Griffin King. There are hundreds of stories about his adventures (IV: 150, 606)
Houses descended of the First Men tend to have short, simple, descriptive names (SSM: 1)