[3] The work of his father as an expert in wine production and cellar caretaker was recognized in the city of Cádiz and also in Seville, from where he received an important offer, so the family moved to there around the 1890s or at the beginning of the century.

[2] During his stay in Great Britain, Gallegos became a polyglot due to his ease in the study of languages, so much so that he managed to learn English, French, and German in just four years there.

[1] In 1903, the 23-year-old Gallegos returned to Seville, where he established himself as a ship consignee and customs agent, which gave him a close relationship with the British who arrived at the port of Seville,[2] where he befriended, among others Englishmen, Adam Wood, the captain of the Steamer Cordova, a ship that made the Seville-London route transporting bitter oranges for the making of jam.

[1] Most of these matches were played in a closed corral at the La Trinidad glass factory, which was owned by Luis Rodríguez Caso and led by his brother-in-law Rafael Giménez de Aragónguada, who would later be part of the group of Sevillistas who registered the club in 1905.

[1][5] At the end of 1904, however, Gallegos championed this sport,[1] more specifically in October 1904, when he, together with a group of young people, his friends Manuel Jiménez de León, Ángel Leániz, Tiburcio Alba, and Luis Ibarra among others, decided to begin the process of registering the Sevilla football club for three fundamental reasons:[1][2] To give it a public character and put an end to clandestinity; to comply with the Royal Circular Order of 1902, which obliged associations to register in the Registry of Associations (previously it was not necessary); and to enable Sevilla FC to participate in the competitions that were beginning to be organized at the national level, such as the Copa del Rey, which had started in 1903.

[5] Between October 1904 and January 1905, he created the club's new statutes, which were presented for approval by the civil governor José Contreras Carmona, and after the acceptance of the statutes and election of the board of directors on 23 September 1905,[1] in which Gallegos was appointed president in a meeting of about forty members held at Tiburcio Alba's house on Génova Street,[5] the club was finally registered in the Registry of Associations on 14 October 1905.

[5] He was accompanied in his initial management by young enthusiasts from wealthy families who had also played football in England and other foreign countries, and who had recently arrived from abroad, including from Great Britain, such as the Alba brothers (Tiburcio and Paco) and Mackenzie, others from Switzerland, such as the Zapata brothers (Manuel and Fermín) and Pepe Lafita, and even someone who came from France, Bezard,[5] and Carlos Langdon, the son of John Sidney Langdon, a founding member and doctor of the Sevilla FC of the 1890s.

[4] Sevilla FC played on this field until the autumn of 1908, when the land was occupied by the Real Tennis Club, with football moving to other spaces closer to the Prado in San Sebastián.

[5] In a Sevilla photo from 1907, the Sevilla president Gallegos and Benito Romero, manager and player can be seen in their own fair booth, displaying some photos, plaques, and paintings, probably referring to the team, as well as the club trophies, which have not yet been identified by modern historians, since the oldest trophy that the entity preserves is the 1912 Seville Cup.