Mariano Esteban's family made a donation of his bibliographic and archival legacy at the Historicomedical Library Vicente Peset Llorca, which has been incorporated into the 'Finds' catalog and can be consulted by anyone interested. It consists of more than 500 records, including its medical archive, which includes clinical stories, graphic material related to its work (x-rays, plates, photographs) and work drafts it published.

The professors of the Department of History of Science and Documentation María José Báguena and José Luis Fresquet have made a selection of the main materials of this donation, which are now exhibited at the Institute of History of Medicine and Science López Piñero.

Mariano Esteban Gil (Valencia, 1904-Valencia, 1977) took a degree in the Faculty of Medicine of Valencia, where he graduated in 1927. A year later he read his doctoral thesis entitled 'Contribution to the study of Farhaeus' reaction and his results in Crenology ', he later completed his training with Dr. Abilio García Baró in the digestive diseases service of the Valdecilla Health House in Santander. He also trained in Paris, in the hospitals of the Salpetrière, Hôtel Dieu and Vaugirard.

On his return to Valencia, he won the position of doctor of the municipal body of Charity and entered as assistant of practical classes in the Chair of Medical Pathology A of the Faculty of Valencian Medicine led by Fernando Rodríguez Fornos, placed in the which stayed in 1939 with José Almela Guillén and in 1953 with Manuel Valdés Ruiz. He received a Cajal scholarship from the Superior Council for Scientific Research.

In 1956 he obtained the Prefecture of the Gastroenterology Service of the Municipal Polyclinic Institute of Valencia and was part of the Municipal Health Board of the City Council. Later, he was Head of the Room at the Digestive Service of the Provincial Hospital of Valencia. He held the presidency of the Valencian Society of Digestive Pathology between 1964 and 1966 and was a founding member in 1967 of the Spanish Association of Hepatology.

On December 5, 1972, he entered the Royal Academy of Medicine of Valencia with the speech entitled 'Islamic Antecedents of the bromatology of the Valencian Country', in which he stressed the use of rice by Arabs as food in patients of the digestive tract.

Among his publications, his contributions to the study of sideremia in digestive diseases and the electrophoresis of gastric juice stand out.