This theatre has taken the lead in getting up every thing novel, in either branch of the drama, and that in a style very much superior to any other establishment of the kind upon the continent. It must be evident that it is the wish, as it is the interest of the manager, to conduct the trust committed to him upon the most liberal principles: that which pleases the public most, is most favourable to him. It must be observed, that the limits of a sketch like this, could only admit of a very concise and general view of the subject. The writer has no farther connexion or interest in the theatre, than that he holds in common with those who are partial to dramatic entertainments, and who think with him that a well regulated theatre, which is the only public amusement Baltimore can boast of, instructs while it amuses, and conduces much to that grace and elegance of conversation and manners so fascinating in private life. IRISH MUSIC. In the last number, the reader was presented with a short sketch upon the subject of Irish music, in a letter from the celebrated poet Moore. That gentleman very philosophically ascribes the mixture of levity and melancholy which is discernible in the character, as well as the music of the original native Irish, to political circumstances. All who have paid attention to the airs of that country must have perceived that they are extremely lively and exhilarating, or delightfully plaintive and melancholy. The former may be considered as displaying the ground-work, or the natural temperament, the other the superinduced adventitious character, derived from poverty and oppression. A writer of considerable talents and intimate knowledge of the subject (Mr. Walker) adverting to the poetry as well as the music of Ireland, speaks as follows: