Spanish operatic tenor (1869–1919) who, in the course of his international career, earned a reputation as one of the most ‘difficult’ performers of his day. ALS in Spanish, signed 'Constantino,' three pages on two adjoining sheets, 4.75 x 7, June 7, 1905, tipped into a larger page. Untranslated correspondence in response to a letter. In fine condition, with toning and soiling to the first page. RRAuction COA.