SECT. 2. No further deliveries of scrip shall be made to said company upon the conditions authorized in former acts, but the undelivered portions of the loan of two millions of dollars authorized by chapter two hundred and twenty-six of the acts of eighteen hundred and fifty-four, amounting to one million seven hundred and seventy thousand dollars, shall be divided and apportioned between the railroad and tunnel, and for the construction of each, respectively; six hundred and fifty thousand dollars for the completion of the unfinished portion of railroad extending from the eastern terminus of said road near Greenfield to within half a mile of the eastern-end of Hoosac Tunnel, and one million one hundred and twenty thousand dollars for the completion of the tunnel, which shall be delivered upon the conditions and in the manner hereinafter declared, subject however to the provisions of the third section of chapter one hundred and seventeen of the acts of eighteen hundred and fifty-nine. No delivery of any portion of said scrip shall be made until said company shall, at a special meeting duly authorized for the purpose, have assented to the provisions of this act, nor until said company shall have duly made and located their line of road as aforesaid, and shall have executed to the Commonwealth such further bond and mortgage, or other assurances of title on their franchise, railroad, or other property, as the attorney-general shall prescribe, for the further security of the Commonwealth; and said bond and mortgage, and other assurances, and all bonds, mortgages, or other assurances heretofore made to the Commonwealth by said company, shall have priority to and be preferred before any and all attachments or levies on execution heretofore or hereafter made.