Aberdeen and Temair, J. C. H., & Plunkett, G. N. (1912). Letter from John Campbell Hamilton-Gordon, 1st Marquess of Aberdeen and Temair to George Noble Plunkett, Count Plunkett, confirming that the Düsseldorf maps were duly delivered as well as other plans and discussing the omission on the part of some person in connection with the placing of these plans under George Noble Plunkett, Count Plunkett's care in the museum.

Aberdeen and Temair, John Campbell Hamilton-Gordon, and George Noble Plunkett. Letter from John Campbell Hamilton-Gordon, 1st Marquess of Aberdeen and Temair to George Noble Plunkett, Count Plunkett, Confirming That the Düsseldorf Maps Were Duly Delivered as Well as Other Plans and Discussing the Omission on the Part of Some Person in Connection with the Placing of These Plans Under George Noble Plunkett, Count Plunkett's Care in the Museum. 1912.