_Indian Knowledge of English Affairs._--Mr. Catlin, in one of his lectures on the manners and customs of the North American Indians, during the last week, related a very curious occurrence, which excited a great deal of surprise and some considerable mirth amongst his highly respectable and numerous audience. Whilst speaking of the great and warlike tribe of Sioux or Dahcotas, of 40,000 or 50,000, he stated that many of this tribe, as well as of several others, although living entirely in the territory of the United States, and several hundred miles south of her Majesty's possessions, were found cherishing a lasting friendship for the English, whom they denominate Saganosh. And in very many instances they are to be seen wearing about their necks large silver medals, with the portrait of George III. in bold relief upon them. These medals were given to them as badges of merit during the last war with the United States, when these warriors were employed in the British service. The lecturer said that whenever the word Saganosh was used, it seemed to rouse them at once; that on several occasions when Englishmen had been in his company as fellow-travellers, they had marked attentions paid them by these Indians as Saganoshes. And on one occasion, in one of his last rambles in that country, where he had painted several portraits in a small village of Dahcotas, the chief of the band positively refused to sit, alleging as his objection that the Pale-faces, who were not to be trusted, might do some injury to his portrait, and his health or his life might be affected by it. The painter, as he was about to saddle his horse for his departure, told the Indian that he was a Saganosh, and was going across the Big Salt Lake, and was very sorry that he could not carry the picture of so distinguished a man. At this intelligence the Indian advanced, and after a hearty grip of the hand, very carefully and deliberately withdrew from his bosom, and next to his naked breast, a large silver medal, and turning his face to the painter, pronounced with great vehemence and emphasis the word Sag-a-nosh! The artist, supposing that he had thus gained his point with the Indian Sagamore, was making preparation to proceed with his work, when the Indian still firmly denied him the privilege--holding up the face of his Majesty (which had got a superlative brightness by having been worn for years against his naked breast), he made this singular and significant speech:--"When you cross the Big Salt Lake, tell my Great Father that you saw his face, and it was bright!" To this the painter replied, "I can never see your Great Father, he is dead!" The poor Indian recoiled in silence, and returning his medal to his bosom, entered his wigwam, at a few paces distant, where he seated himself amidst his family around his fire, and deliberately lighting his pipe, passed it around in silence.