Source: for the English text, the Times of London, May 31, 1906, page 5F (citing the Foreign Office Treaty Series no. 6, Cd. 2923). For the Spanish text, the Real Academia Matritense de Herádica y Genealogía (citing the Gaceta de Madrid , May 30, 1906, num. 150, tomo II p. 829). According to the latter source, the ratifications were exchanged on May 23 in London. Note that, following diplomatic usage, the king of Spain is named before the king of the United Kingdom (and his representative signs first) in the Spanish text, and conversely in the English text.