Section 3. Every article in the collections and additions mentioned in Section 11 of this Act shall be marked a

13. Every article in the collections and additions mentioned in Section 11 of this Act shall be marked and numbered and shall (subject to the provisions contained in Sections 9, 14 and 15 of this Act) be kept and preserved in the said Indian Museum with such marks and numbers, and an inventory of such articles shall be made by the said Society, and, on such articles being deposited as aforesaid, one copy of such inventory shall be signed by the said Trustees, and kept by the said Society, and another copy shall be signed by the Council of the said Society, and kept by the said Trustees. All objects taken in exchange under Section 9 of this Act for, and all monies payable on sale under the same Section of, any of such articles, shall be held on trusts and subject to powers and declarations corresponding as nearly as may be with the trusts, powers and declarations by this Act limited and declared concerning the same articles.