On the Fourth of July an unprecedented event was witnessed in Washington. By special consent of the President, the White House grounds were granted to the colored people of the city for a grand Sunday-school festival, and never did they present a busier or more jubilant scene. Inside the grounds a platform was erected, upon which accommodations were placed for speakers. Around this were rows of benches, which, during the greater part of the day, were not only well filled but crowded. Meanwhile groups reposed under every tree or walked to and fro along the shaded paths. From the thick-leaved branches of the trees were suspended swings, of which all, both old and young, made abundant use. Every contrivance which could add to the pleasure of the time was brought into energetic requisition, and altogether no celebration of the day presented a greater appearance of enjoyment and success. By the Act of Emancipation, Mr. Lincoln built for himself the first place in the affections of the African race on this continent. The love and reverence manifested for his name and person on all occasions during the last two years of his life, by this down-trodden people, were always remarkable, and sometimes of a thrilling character. In the language of one of the poor creatures who stood weeping and moaning at the gateway of the avenue in front of the White House, while the beloved remains were lying in state in the East Room, “_they_ had him.” No public testimonial of regard, it is safe to say, gave Mr. Lincoln more sincere pleasure during his entire public life, than that presented by the colored people of the city of Baltimore, in the summer of 1864, consisting of an elegant copy of the Holy Bible. The volume was of the usual pulpit size, bound in violet-colored velvet. The corners were bands of solid gold, and carved upon a plate also of gold, not less than one fourth of an inch thick. Upon the left-hand cover, was a design representing the President in a cotton-field knocking the shackles off the wrists of a slave, who held one hand aloft as if invoking blessings upon the head of his benefactor,--at whose feet was a scroll upon which was written “Emancipation”; upon the other cover was a similar plate bearing the inscription:-- “To ABRAHAM LINCOLN, President of the United States, the friend of Universal Freedom. From the loyal colored people of Baltimore, as a token of respect and gratitude. Baltimore, July 4th, 1864.” The presentation was made by a committee of colored people, consisting of three clergymen and two laymen, who were received by the President in the most cordial manner, after which the Rev. S. W. Chase, on the part of the committee, said:--