President unwell in morning. Scarcely takes food all day. Misses appointment with Gen. Schenck. Abraham Lincoln to Robert C. Schenck, 23 July 1863, CW, 6:345-46.

Suggests $2,500 as annual compensation for chief chemist of Agriculture Dept. Abraham Lincoln to Isaac Newton, 22 July 1863, CW, 6:343.

President Lincoln writes a letter of introduction for a Mr. Houston to present to the Secretary of War Edwin M. Stanton. Lincoln writes, "[the] bearer of this, now has three sons in the war. He wishes the youngest, Albert P. Houston, now in the 108th Ills regiment, at Vicksburg [Mississippi], transferred to the 1st West Tennessee regiment of Cavalry, at Bolivar [Tennessee] when last heard from, and in which is one of his elder brothers. I would like for him to be obliged." Abraham Lincoln to Edwin M. Stanton, 22 July 1863, Henry Horner Lincoln Collection, Abraham Lincoln Presidential Library, Springfield, IL.