Not long afterward the Greenes were visited by a party of gentlemen, chiefly officers who had served under the general in the Revolutionary War. The conversation turned on the state of agriculture. It was remarked that unfortunately there was no means of cleaning the staple of the green cotton-seed, which might otherwise be profitably raised on land unsuitable for rice. But until someone devised a machine which would clean the cotton, it was vain to think of raising it for market. Separating one pound of the clean staple from the seed was a day's work for a woman. The time usually devoted to the picking of cotton was the evening, after the labor of the field was over. Then the slaves--men, women, and children--were collected in circles, with one in the middle whose duty it was to rouse the dosing and quicken the indolent. While the company were engaged in this conversation, Mrs. Greene said: "Gentlemen, apply to my young friend here, Mr. Whitney; he can make anything." And she showed them the frame and several other articles he had made. He modestly disclaimed all pretensions to mechanical genius, and replied that he had never seen cotton-seed. Nevertheless, he immediately began upon the task of inventing and constructing the machine on which his fame depends. A Mr. Phineas Miller, a neighbor, to whom he communicated his design, warmly encouraged him, and gave him a room in his house wherein to carry on his operations. Here he began work with the disadvantage of being obliged to manufacture his own tools and draw his own wire--an article not to be found in Savannah. Mr. Miller and Mrs. Greene were the only persons who knew anything of his occupation. Near the close of the winter, 1793, the machine was so far completed as to leave no doubt of its success. The person who contributed most to the success of the undertaking, after the inventor, was his friend, Miller, a native of Connecticut and, a graduate of Yale. Like Whitney, he had come to Georgia as a private teacher, and after the death of General Greene he married the widow. He was a lawyer by profession, with a turn for mechanics. He had some money and proposed to Whitney to become his partner, he to be at the whole expense of manufacturing the invention until it should be patented. If the machine should succeed, they agreed that the profits and advantages should be divided between them. A legal paper covering this agreement and establishing the firm of Miller & Whitney, bears the date of May 27, 1793.