He had gone away in the prime of life; he returned a white-haired and broken-down old man. Li Ling and Su Wu are said to have exchanged poems at parting, and these are to be found published in collections under their respective names. Some doubt has been cast upon the genuineness of one of those attributed to Li Ling. It was pointed out by Hung Mai, a brilliant critic of the twelfth century, that a certain word was used in the poem, which, being part of the personal name of a recent Emperor, would at that date have been taboo. No such stigma attaches to the verses by Su Wu, who further gave to his wife a parting poem, which has been preserved, promising her that if he lived he would not fail to return, and if he died he would never forget her. But most famous of all, and still a common model for students, is a letter written by Li Ling to Su Wu, after the latter’s return to China, in reply to an affectionate appeal to him to return also. Its genuineness has been questioned by Su Shih of the Sung dynasty, but not by the greatest of modern critics, Lin Hsi-chung, who declares that its pathos is enough to make even the gods weep, and that it cannot possibly have come from any other hand save that of Li Ling. With this verdict the foreign student may well rest content. Here is the letter:-- “O Tzŭ-ch‘ing, O my friend, happy in the enjoyment of a glorious reputation, happy in the prospect of an imperishable name,--there is no misery like exile in a far-off foreign land, the heart brimful of longing thoughts of home! I have thy kindly letter, bidding me of good cheer, kinder than a brother’s words; for which my soul thanks thee. “Ever since the hour of my surrender until now, destitute of all resource, I have sat alone with the bitterness of my grief. All day long I see none but barbarians around me. Skins and felt protect me from wind and rain. With mutton and whey I satisfy my hunger and slake my thirst. Companions with whom to while time away, I have none. The whole country is stiff with black ice. I hear naught but the moaning of the bitter autumn blast, beneath which all vegetation has disappeared. I cannot sleep at night. I turn and listen to the distant sound of Tartar pipes, to the whinnying of Tartar steeds. In the morning I sit up and listen still, while tears course down my cheeks. O Tzŭ-ch‘ing, of what stuff am I, that I should do aught but grieve? The day of thy departure left me disconsolate indeed. I thought of my aged mother butchered upon the threshold of the grave. I thought of my innocent wife and child, condemned to the same cruel fate. Deserving as I might have been of Imperial censure, I am now an object of pity to all. Thy return was to honour and renown, while I remained behind with infamy and disgrace. Such is the divergence of man’s destiny.