The regular nights of performance are Sundays and Thursdays; though there are sometimes performances on Tuesdays, saints' days, &c. Sunday nights are the most crowded, as in all Catholic countries. On rainy nights there is no performance. The usual performances at the theatre consist of a play and farce; with singing, sometimes, between the acts. "_Othello_" is at times performed--not that of our Shakspeare, but a translation from the French. Its absurdities and tameness no Englishman can endure with common patience; he looks in vain for those bursts that overpower the imagination, and electrify the spectators. An ingenious English gentleman translated Cumberland's "_Wheel of Fortune_," and "_The Jew_;" but they are too sentimental to please this audience. "_Love laughs at Locksmiths_" and "_Matrimony_," from the original French, are stock pieces; and "_The Scottish Outlaw_," and "_Charles Edward Stuart_" are very successful. The performers are about equal to those of our country theatres. Of the females, Doña Trinidad Guevra takes the lead. She has a good figure, a tolerably expressive face, and a sweet, plaintive voice. In such parts as _Letitia Hardy_, and _Maria_, in "_The Citizen_," she excels; and likewise in the sentimental. Velarde is their first male performer, and plays tragedy, comedy, farce--it would be unkind to say, with _Silvester Daggerwood_--and "makes nothing of them;" for, in comedy, he has talent: his tragedy is not first-rate. He has the merit of dressing his characters with some regard to costume. I have seen him personate a British officer, with a uniform coat nearly a copy of those worn by our Foot-Guard officers.--The general manner of dress upon the stage, at times, approaches to the burlesque. An English nobleman is always made to wear the order of the Garter, and a star, whether in street, forest, or drawing-room. Señor Rosquellas, in the part of _Lord Leicester_ or _Essex_ (I know not which) in Rossini's "_Queen Elizabeth_," wears the dress of a modern French field-marshal: his taste and experience should reform this. Señor Culebras (in English, Mr. Snake) is made the butt of the juvenile part of the audience--the _Claremont_ of this theatre. When he appears to give out the play, they vociferate his name. Why they thus make sport of him, I know not, except that he has a peculiarly spare person, and is a sort of deputy manager, the Mr. Lamp of the company. He is said to be a sensible man, speaking the Spanish language very correctly. As an actor, he is both chaste and pleasing. In low comedy, they have a good actor, named Felipe David, the Liston of the company; and one Señor Vera, who is a useful performer, as well as singer, and has abilities of no mean order. His representation of _Colonel Cox_, in the play of "_Charles Edward Stuart_," founded upon an incident after the battle of Culloden, forcibly brought to my recollection Lovegrove's _Rattan_, in the farce of "_The Bee-Hive_."