In later years it seems that Jefferson changed from his position of certainty as to the inferiority of the Negro to that of doubt. At one time he believed in the possibilities of the Negro and then again he receded from that position to take up the argument that the blacks lack the capacity with which the whites are endowed. Jefferson shows that he was either ill-informed or insincere. Writing to General Chastellux in 1785 concerning the future of the Negro Jefferson remarked:
I have supposed the black man, in his present state might not be in body and mind equal to the white man; but it would be hazardous to affirm, that, equally cultivated for a few generations, he would not become so.[82]
To Benjamin Banneker, the surveyor and astronomer, who was regarded by some as his friend, he addressed the following in 1791:
Nobody wishes more than I do to see such proofs as you exhibit, that nature has given to our black brethren talents equal to those of the other colors of men, and that the appearance of a want of them is owing merely to the degraded condition of their existence, both in Africa and America.... I have taken the liberty of sending your Almanac to Monsieur de Condorcet, Secretary of the Academy of Sciences at Paris, and member of the Philanthropic Society, because I considered it as a document to which your color had a right for their justification against the doubts which have been entertained of them[83]
Jefferson's letter to the Marquis de Condorcet presented Banneker's attainments as evidence of the mental capacity of Negroes. He said:
We have now in the United States a Negro, the son of a black man born in Africa and a black woman born in the United States, who is a very respectable mathematician. I procured him to be employed under one of our chief directors in laying out the new Federal City on the Potomac and in the intervals of his leisure, while on that work, he made an almanac for the next year, which he sent me in his own handwriting, and which I enclose to you. I have seen very elegant solutions of geometrical problems by him. Add to this that he is a very worthy and respectable member of society. He is a free man. I shall be delighted to see these instances of moral eminence so multiplied as to prove that the want of talents observed in them, is merely the effect of their degraded condition, and not proceeding from any difference in the structure of the parts on which intellect depends[84]
In a letter to Banneker himself concerning the achievements of this astronomer and mathematician, Jefferson said:
Nobody wishes more ardently than I do to see a good system commenced for raising the condition both of their body and mind to what it ought to be, as fast as the imbecility of their present existence, and other circumstances which cannot be neglected, will admit.[85]
A generation later he had, as this letter indicates, retained the opinion that the possibilities of the Negroes were not necessarily limited. To Henri Grégoire who had sent Jefferson a copy of his Litterature des Nègres, he wrote:
Be assured that no person living wishes more sincerely than I do to see a complete refutation of the doubts I have myself entertained and expressed on the grade of understanding allotted to the negroes by nature, and to find that in this respect they are on a par with ourselves. My doubts were the result of personal observation on the limited sphere of my own State, where the opportunities for the development of their genius were not favorable, and those of exercising it still less so. I expressed them, therefore, with great hesitation; but whatever be their degree of talent it is no measure of their rights. Because Sir Isaac Newton was superior to others in understanding, he was not therefore lord of the person or property of others. On this subject they are gaining daily in the opinions of nations, and hopeful advances are making towards their reestablishment on an equal footing with the other colors of the human family. I pray you, therefore, to accept my thanks for the many instances you have enabled me to observe of respectable intelligence in that race of men, which cannot fail to have effect in hastening the day of their relief.[86]