INDIANAPOLIS, JULY 19. Illinois sent three large delegations this date from Springfield, Jacksonville and Monticello. Conspicuous in the column was the famous "Black Eagle" Club of Springfield, led by its President, Sam H. Jones, and the Lincoln Club, commanded by Capt. John C. Cook. In the Springfield delegation were twenty-one original Whigs who voted for Gen. Wm. Henry Harrison, among them Jeriah Bonham, who wrote the first editorial--Nov. 8, 1858--proposing the candidacy of Abraham Lincoln for President. Others among the prominent visitors from Springfield were: Col. James T. King, C. A. Vaughan, Major James A. Connelly, Paul Selby, Hon. David T. Littler, Jacob Wheeler, Gen. Charles W. Pavey, Robert J. Oglesby, Ira Knight, C. P. Baldwin, James H. Kellogg, Alexander Smith, Geo. Jameson, Augustus C. Ayers, Jacob Strong, Dr. F. C. Winslow, Fred Smith, Charles T. Hawks, Hon. Henry Dement, Col. Theo. Ewert, Jacob Bunn, J. C. Matthews, J. R. Stewart, H. W. Beecher, Andrew J. Lester, Dr. Gurney, and Howes Yates, brother of the great war Governor. The Jacksonville visitors were represented by Hon. Fred H. Rowe, ex-Mayor Tomlinson, Judge T. B. Orear, J. B. Stevenson, Dr. Goodrich, Professor Parr of Illinois College, J. W. Davenport, and Thomas Rapp. Attorney-General Hunt spoke on behalf of all the visitors. General Harrison's reply was one of his happiest speeches. He said: _General Hunt and my Illinois Friends_--I thank you for this cordial expression of your interest in Republican success. I thank you for the kindly terms in which your spokesman has conveyed to me the assurance, not only of your political support, but of your personal confidence and respect. The States of Indiana and Illinois are neighbors, geographically. The river that for a portion of its length constitutes the boundary between our States is not a river of division. Its tendency seems to be, in these times when so many things are "going dry" [cheers], rather to obliterate than to enlarge the obstruction between us. [Cheers.] But I rejoice to know that we are not only geographically neighbors, but that Indiana and Illinois have been neighborly in the high sentiments and purposes which have characterized their people. I rejoice to know that the same high spirit of loyalty and devotion to the country that characterized the State of Illinois in the time when the Nation made its appeal to the brave men of all the States to rescue its flag and its Constitution from the insurrection which had been raised against them was equally characteristic of Indiana--that the same great impulse swept over your State that swept over ours--that Richard Yates of Illinois [cheers] and Oliver P. Morton of Indiana [prolonged cheers] stood together in the fullest sympathy and co-operation in the great plans they devised to augment and re-enforce the Union armies in the field and to suppress and put down treasonable conspiracies at home.