Throughout the revolutionary period he represented in cabinets with Prim, Serrano and Ruiz Zorilla, and lastly under King Amadeus, the advanced Radical tendencies of the men who wanted to give Spain a democratic monarchy.
He reappeared for a few months after General Pavia's coup d'Nat in January 1874, to join a coalition cabinet formed by Marshal Serrano, with Sagasta and Ulloa.
Shortly afterwards Martos joined the dynastic Left organized by Marshal Serrano, General Lopez Dominguez, and Moret, Becerra, Balaguer, and other quondam revolutionaries.
He was one of the members of the first cabinet after the revolution, and in 1869, under the regency of Marshal Serrano, he became minister of grace and justice.
On the arrival of Amadeus in Spain, Ruiz Zorilla became minister of public works for a short time, and resigned by way of protesting against Serrano and Topete entering the councils of the new king.
He returned, via Gibraltar, with Prim, Serrano and others, to take part in the rising at Cadiz, which culminated in the revolution of September 1868, and Sagasta was in succession a minister several times under Serrano and then under King Amadeo of Savoy, 1868-187 2.
He took office under Marshal Serrano during 1874, after the pronunciamiento of General Pavia had done away with the Cortes and the Federal Republic. He vainly attempted to crush the Carlists in 1874, and to check the Alphonsist military conspiracy that overthrew the government of Marshal Serrano at the end of December 1874.
Facing the city is the low barren island of Serrano, or Iquique, which is connected with the mainland by a stone causeway 1500 ft.
At the end of the year, when Marshal Serrano left Madrid to take command of the northern army, General Martinez Campos, who had long been working more or less openly for the king, carried off some battalions of the central army to Sagunto, rallied to his own flag the troops sent against him, and entered Valencia in the king's name.
To all - to the Revolution of 1868, the Constituent Cortes of 1869, King Amadeus, the Federal Republic of 1873, the nameless government of Marshal Serrano in 1874, the Bourbon restoration in 1875 - he simply said: "Cumplase la voluntad nacional" ("Let the national will be accomplished").
In the Cathedral Square (Plaza de Armas), embracing two citysquares, and shaded - like all the plazas of the island - with laurels and royal palms, are a statue of Isabel the Catholic, and two marble lions given by Queen Isabel II.; elsewhere there are statues of General Clouet and Marshal Serrano, once captaingeneral.
He returned to Malacca in 1514, leaving one of his captains, Francisco Serrano, at Ternate, where Magellan's followers found him in 1521.
He thus gave much trouble to men like Serrano, Topete and Prim, who had never harboured the idea of drifting into advanced democracy, and who had each his own scheme for re-establishing the monarchy with certain constitutional restrictions.
In the background Marshal Serrano and many politicians and military men steadily advocated a coup d'etat in order to avert the triumph of the republicans.
The president, Salmeron, and Marshal Serrano himself lacked decision at the last moment, and lost time and many opportunities by which the republican ministers profited.
He selected his generals without respect of politics, sending Moriones to the Basque provinces and Navarre at the head of 20,000 men, Martinez Campos to Catalonia with several thousand, and Lopez Dominguez, the nephew of Marshal Serrano, to begin the land blockade of the last stronghold of the cantonal insurgents, Cartagena, where the crews of Spain's only fleet had joined the revolt.
The Cortes went on wrangling for a day and night until, at daybreak on the 3rd of January 1874, General Pavia forcibly ejected the deputies, closed and dissolved the Cortes, and called up Marshal Serrano to form a provisional government.
Castelar kept apart from active politics during the twelve months that Serrano acted as president of the republic. Another pronunciamiento finally put an end to it in the last week of December 1874, when Generals Campos at Sagunto, Jovellar at Valencia, Primo de Rivera at Madrid, and Laserna at Logrono, proclaimed Alphonso XII.
She went into exile at the end of September 1868, after her Moderado generals had made a slight show of resistance that was crushed at the battle of Alcolea by Marshals Serrano and Prim.
Pending his return the administration was left in the hands of General Campo Serrano and General Eliseo Payan.
After the revolution of 1868 he declined the post of minister of finance offered by Marshal Serrano, but served in that capacity in 1872 and 1874 in Sagasta's cabinets.