A codicil is a testamentary document similar but not necessarily identical to a will. A late codicil to Kaspar's will gave him and Johanna joint guardianship. A will can be revoked by a subsequent valid will or by a codicil. Furthermore, a will that did not nominate an heir could be considered a codicil. Sir William Gull's will, with a codicil, was dated 27 November 1888. In 1788 Don Miguel placed a codicil in Guadalajara indicating his wishes. In the United States, a codicil is a document that changes an existing will. Her will and codicil were proved on 7 December 1687. The auctioneer announces that a codicil in Ira's will exists regarding the auction. A bitterly fought court case confirmed the codicil. Having possession, London's National Gallery did not recognise the codicil. No contemporary sources mention Washington as adding a religious codicil to his acceptance. Catherine's will includes a surprise codicil returning Leslie's stock in the mill to her father. This was followed by a much shorter codicil. This deficiency has since been addressed by the SCOPIC codicil to the LOF.