The Assyrian chronicles end abruptly in 639 BC after the destruction of Susa, the capital of Elam, and the subjugation of a rebellious Babylon ruled by Ashurbanipal's own brother Shamash-shum-ukin. Business records are missing after 631 BC. The primary sources are written afterwards by a victorious Neo-Babylonian from the reign of Nabopolassar. The primary chronicle is numbered 21901, which was translated by C. J. Gadd in 1923, and can be found in the British Museum. By the Babylonian tradition set down by Herodotus much later, a Hebrew tradition attributed to Nahum, and by reference in Egyptian chronicles, all were hostile to Assyria. There are also legends that have grown up in the centuries afterwards, among peoples who descend from one of the involved nationalities, including the still Mesopotamian Eastern Aramaic speaking and Christian Assyrians of northern Iraq, southeast Turkey, northwest Iran and northeast Syria.