Aside from his brilliancy and power in public life, Lennox had other qualities that distinguished him as a man. He was noted for his cosmopolitan views concerning human affairs. He had an uncommon largeness and breadth of vision, all the more notable then, as America was, in many respects, outside the greater world of Europe. People in speaking of him, however, recalled the extraordinary variety and intensity of his experiences. Much of his story was known and it was not diminished in the telling. He was always at home in the woods. He had an uncommon sympathy for hunters, borderers, pathfinders and all kinds of wilderness rovers. He understood them and they instinctively understood him, invariably finding in him a redoubtable champion. He was also closely in touch with the Indian soul, and his friends used to say laughingly that he had something of the Indian in his own nature. At all events, the Great League of the Hodenosaunee found in him a defender and he was more than once an honored guest in the Vale of Onondaga.
On the other hand, his interest in European affairs was always keen and intelligent, especially in those of England and France, with whose sons he had come into contact so much during the great war. He maintained a lifelong correspondence with his friend, Alfred Grosvenor, who ultimately became a nobleman and who sat for more than forty years in the House of Lords. Lennox visited him several times in England, both before and after the quarrel between the colonies and the mother country, which, however, did not diminish their friendship a particle. In truth, during those troubled times Grosvenor, who was noted for the liberality of his sentiments and for an affection for Americans, conceived during his service as a soldier on their continent in the Seven Years' War, often defended them against the criticism of his countrymen, while Lennox, on his side, very boldly told the people that nothing could alter the fact that England was their mother country, and that no one should even wish to alter it.
But his correspondence with his uncle, Raymond Louis de St. Luc, Marquis de Clermont, not so many years older than himself, covered a period of nearly sixty years filled with world-shaking events, and, though it has been printed for private circulation only, it is a perfect mine of fact, comment and illumination. St. Luc was one of the few French noblemen to foresee the great Revolution in his country, and, while he mourned its excesses, he knew that much of it was justified. His patriotism and courage were so high and so obvious that neither Danton, Marat nor Robespierre dared to attack him. As an old man he supported Napoleon ardently until the empire and the ambitions of the emperor became too swollen, and, while he mourned Waterloo, he told his son, General Robert Lennox de St. Luc, who distinguished himself so greatly there and who almost took the château of Hougoumont from the English, that it was for the best, and that it was inevitable. It was the comment of St. Luc, then eighty-five years old and full of experience and wisdom, that a very great man may become too great.
Lennox was noted for his great geniality and his extraordinary capacity for making friends. Yet there was a strain of remarkable gravity, even austerity, in his character. There came times when he wished to be alone, to hear no human voices about him. It was then perhaps that he thought his best thoughts and took, too, his best resolutions. In the great silences he seemed to see more clearly, and the path lay straight before him. Many of his friends thought it an eccentricity, but he knew it was an inheritance from his long stay alone upon the island, a period in his life that had so much effect in molding his character.
It was this ripeness of mind, based upon fullness of information and deep meditation, that made him such a great man in the true sense of the word. As a speaker he was without a rival either in form or substance in the New World. It was said everywhere in New York that the famous Alexander Hamilton and the equally skillful Aaron Burr went to the courtroom regularly to study his methods. Both admitted quite freely in private that they copied his style, though neither was ever able to acquire the wonderful golden voice, the genuine phenomenon that made Lennox so notable.
On one of these occasions, after making a thrilling speech, when he filled the souls of both Hamilton and Burr with despair, a great Onondaga sachem, in the full costume of his nation, said to his friend Willet, once a renowned hunter:
"I always knew Dagaeoga could use more words than any one else could find in the biggest dictionary."