Referring to their attitude, the publishers said in their editorial notice that "they felt gratified in the opportunity of presenting to the public, through their press, an accurate Ephemeris for the year 1792, calculated by a sable descendant of Africa." They flatter themselves "that a philanthropic public, in this enlightened era, will be induced to give their patronage and support to this work, not only on account of its intrinsic merit (it having met the approbation of several of the most distinguished astronomers of America, particularly the celebrated Mr. Rittenhouse), but from similar motives to those which induced the editors to give this calculation the preference, the ardent desire of drawing modest merit from obscurity and controverting the long established illiberal prejudice against the blacks."167
Banneker had himself not lost sight of the probable effect of his work in reshaping to some extent the public estimate concerning the intellectual capacity of his race. And this was the thought that prompted him to send a manuscript copy of his first almanac to Thomas Jefferson, then Secretary of State in Washington's cabinet. In his letter to Jefferson, dated August 19, 1791, Banneker made, with characteristic modesty, a polite apology for the "liberty" he took in addressing one of such "distinguished and dignified station," and then proceeded to make a strong appeal for the exercise of a more liberal attitude towards his downtrodden race, using his own achievements as a proof that the "train of absurd and false ideas and opinions which so generally prevails with respect to the Negro should now be eradicated."168
Thomas Jefferson took note of the moral courage and the loyalty to race evident throughout the whole of Banneker's remarkable letter and he honored it with the most courteous reply, under date of August 30, 1791. After thanking Banneker for the letter and the almanac accompanying it, Jefferson expressed the pleasure it afforded him to see such proofs "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 only to the degraded condition of their existence both in Africa and America." He also added that he desired "ardently to see a good system commenced for raising the condition both of their body and mind to what it ought to be." The copy sent to Jefferson was formally transmitted to M. de Condorcet, secretary of the Academy of Sciences at Paris, and member of the Philanthropic Society because, as he said, he "considered it a document to which your whole race had a right for its justification against the doubts which have been entertained of them." This recognition of Banneker's merit very naturally added greatly to his rapidly growing reputation at home, and brought to him hundreds of letters of congratulation from scholarly men throughout the civilized world.
The most distinguished honor that came to him from his own countrymen was the invitation to serve with the commission appointed by President Washington to define the boundary line and lay out the streets of the Federal Territory, later called the District of Columbia. This commission, was appointed by Washington, in 1789, and was composed of David Stuart, Daniel Carroll, Thomas Johnson, Andrew Ellicott and Major Pierre Charles L'Enfant, a famous French engineer. This personnel was given in the article on Benjamin Banneker by John R. Slattery in the Catholic World in 1883,169 but in the Washington Evening Star of October 15, 1916, reporting an address by Fred Woodward, the commission was said to consist of "Major L'Enfant, Andrew Ellicott, Count de Graff, Isaac Roberdeau, William King, Nicholas King, and Benjamin Banneker, a free Negro."170 It is on record that it was at the suggestion of his friend, Major Andrew Ellicott, who so thoroughly appreciated the value of his scientific attainments, that Thomas Jefferson nominated Banneker and Washington appointed him a member of the commission. In the Georgetown Weekly Ledger, of March 12, 1791, reference is made to the arrival at that port of Ellicott and L'Enfant, who were accompanied by "Benjamin Banneker, an Ethiopian whose abilities as surveyor and astronomer already prove that Mr. Jefferson's concluding that that race of men were void of mental endowment was without foundation."171
Speaking afterwards of his work with this commission, Banneker referred to the unfailing kindness and courtesy of the distinguished company in which he found himself. One of his biographers says that the deportment of the mathematician during this engagement was such as to secure for him the respect and admiration of the commissioners. His striking superiority over all other men of his race whom they had met led them to disregard all prejudices of caste.172 During the stay of the commissioners at their official quarters, Banneker was invited, of course, to eat at the same table with them just as he sat with them during the conferences. This invitation, however, he declined, and provision was then, at his request, made for serving his meals at a separate table but in the same dining room and at the same hour as the others were served.
The reasons for Banneker's refusal to accept this invitation, however, are not so clear. Various of his biographers have attributed his action on this occasion to what they seemed pleased to term his "native modesty." Judging it at this distance from the time of its occurrence, it is perhaps difficult to understand fully his motive. But if we view it in the light of the consistent wisdom and high-mindedness that seemed to guide his whole life we can hope that his reasons for the self-imposed coventry on that occasion were sufficient unto himself, and that they fully excluded every element of servility.
Banneker's work with this commission was undertaken while he was still engaged in astronomical investigation, and after his services in Washington were concluded he returned to his home and resumed his work on his almanacs, which regularly appeared until 1802. He was now living alone in the home left him by his parents, and performed for himself nearly all the domestic services required for his health and comfort. Still obliged to rely mainly upon his farm for his livelihood, he tried various expedients with different tenants to rid himself of the necessity for giving so much of his time to the farm. In these efforts he was wholly unsuccessful. He finally decided, therefore, to enter into such an arrangement in the disposition of his effects as would provide him an annuity, relieving himself of all anxiety for his maintenance and at the same time affording him the leisure he wanted for study. This he was enabled to do through a contract with one of the Ellicotts, by the terms of which his friend was to take the title to Banneker's property, making the latter an annual allowance of 12 pounds for a given period of time calculated by Banneker to be the span of years he could reasonably be expected to live. Banneker was to continue to occupy and use the property during his life, after which the possession was to go to Ellicott.173 Banneker lived, however, eight years longer than he thought he would, but Ellicott faithfully lived up to this contract. This miscalculation is said to have been the only mistake in mathematics Banneker ever made. With his domestic affairs settled to his satisfaction, and having now the desired leisure to continue his studies, he gave himself up wholly to that object.
His active mind now found time also for occasional diversion to other lines than mathematics. It was about this time that he made the calculations showing that the locust plague was recurrent in cycles of 17 years each. He also wrote a dissertation on bees which has been favorably compared with a similar contribution by Pliny on the same subject written nearly 1800 years earlier. Banneker's nature seemed tuned also to the softer notes in the song of life. He loved music, and often, as a relaxation, he would sit beneath a huge chestnut tree near his house and beguile the hours by playing on his flute or violin.174
The disastrous war waged in 1793 so disturbed Banneker that he devoted much time to the study of the best methods to promote peace. To this end he suggested that the United States Government establish a department in the President's cabinet