"Errors that ought to be corrected in my astronomical tables are these: 2d vol. Leadbetter, p. 204, when anomaly is 4s 30 deg. the equation 3 deg. 30' 4" ought to have been 3 deg. 28' 41". In [Symbol: Mars] equation, p. 155, the logarithm of his distance from [Symbol: Sun] ought to have been 6 in the second place from the index, instead of 7, that is, from the time that its anomaly is 3s 24 deg. until it is 4s O deg.." [Transcriber's Note: In above paragraph the actual astronomical symbols for Mars and the Sun appear. Also, 4s appears as 4 superscript s, and 3s appears as 3 superscript s.] Acting upon the suggestion of one of his educated friends, Banneker now undertook to extend his calculations so as to make an Almanac, then the most comprehensive medium of scientific information. Banneker continued the work required to complete his almanac, and finished the first one to cover the year 1792, when he was sixty-one years old. This attracted to him a number of prominent men, among whom was Mr. James McHenry, of Baltimore, a member of John Adams's cabinet. This gentleman, through his high regard for Banneker's achievements, had his almanac published by the firm of Goddard and Angell of Baltimore. In his letter to this firm McHenry paid a fine tribute to the character of the author, although some of his statements as to Banneker's parentage do not harmonize with what appears to the writer as more reliable information from another source. McHenry laid special stress upon the fact that Banneker's work, in the preparation of his almanac, "was begun and finished without the least information or assistance from any person, or from any other books," than those he had obtained from Mr. Ellicott, "so that whatever merit is attached to his present performance is exclusively and peculiarly his own."[164]