[1] The title makes reference to the Convention of Vergara, a symbolic embrace between Espartero and Rafael Maroto which put an end to the First Carlist War in 1839.

The throne would finally be accepted in December 1870 by Amadeo of Savoy, Duke of Aosta, who visited Espartero in 1871 at his palace in Logroño.

Espartero went to meet king Amadeo at the railway station dressed in a gala suit as captain general, accompanied by civil and military authorities of the city.

The nature and content of their conversations during the time they spent together is unknown, but when Espartero accompanied him back to the train station, he displayed signs of joy, respect and seemed to treat him as the legitimate king of Spain, a recognition that could very well be the one Amadeo was looking for.

On his return to Madrid in early January 1872, the king granted him the title of Prince of Vergara with the style of Highness.