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After another eight years, on 14 May 1878, King Luis raised him still higher to Duque de Ávila e Bolama (Duke of Ávila and Bolama), thus making him the first non-noble-born individual so honored, especially in view of the fact that the title of Duke was, traditionally, granted in Portugal solely to members of high nobility and relatives of the Portuguese Royal Family.
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On 13 February 1864, King Luis I of Portugal granted him the title of Conde de Ávila (Count of Ávila) which, six years later, on 24 May 1870, was raised to Marquês de Ávila e Bolama (Marquis of Ávila and Bolama).
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In 1861, he was appointed as Portugal's representative to the Madrid conference, which aimed to resolve the issue of the island of Bolama.