In 1823 he fought in the 3rd Corps of the Pyrenees Army during the Spanish military expedition led by France against the Spanish liberals to restore King Ferdinand VII of Spain to his throne. On the occasion of this campaign, he wrote two chapters in his "Souvenirs" from the Alhambra Palace in Granada. In December 1825, he requested to be attached to the staff of Lieutenant-General Henri Baudrand to accompany him for an inspection of the engineering service in French Guiana, in Barbados and in Martinique, where he met again General Donzelot (the former governor of the Ionian Islands), now governor of the island. Voulgaris twice suffered from tropical fever. He returned to France in August 1826 and devoted a chapter of his "Souvenirs" to this journey.