I understand, on good authority, that the tendency of the public at this juncture of the War is to demand light refreshment. Well, they have it here. For, though the subject deals with a serious problem of the hour, it can be treated, and is treated, with a very permissible humour that just stops short of farce. Some of the stage-devices, as I am assured by my betters, may have a touch of antiquity, but their application is as modern as can well be, and I should indeed be ungrateful if after an entertainment so smoothly and dexterously administered I were to be captious about origins or other matters of pedantry. Mr. DENNIS EADIE, as _Brent_, both in his real character of detective and in the assumed futility of his disguise as a genial idiot, was equally excellent, and again proved his gift for quick-change artistry. Miss MARY JERROLD'S _Fräulein Schroeder_ was extraordinarily Teutonic in all but her quiet humour, which she seemed to have caught from the country of her adoption. The _Fritz_ of Mr. HENRY EDWARDS was another delightful sketch, though his actual German birth and his allegation of Dutch nationality were both belied by the red Italian corpuscles with which the authors had inoculated him. Miss JEAN CADELL, as usual, played a pale and fatuous spinster, but this time, in the part of _Miss Myrtle_, she had her chance, and seized it bravely. When that typical British boarder, Mr. _John Preston, M. P._ (interpreted with great relish and vigour by Mr. HUBERT HARBEN), remarked, "I call a spade a spade," she replied, "And I suppose you would call a dinner-napkin a _serviette_"--one of the pleasantest remarks in a play where the good things said were many and unforced. I have not mentioned the admirable performance--its merits might easily be missed--of Mr. STANLEY LOGAN as a Territorial Tommy; or the very natural manners of Mrs. ROBERT BROUGH as _Mrs. Sanderson_; or the quiet art of Miss RUTH MACKAY in a part (_Miriam Leigh_) that offered a too-limited scope to her exceptional talents. Miss ISOBEL ELSOM contributed her share of the rather perfunctory love-interest with a very pretty sincerity; and Mr. MALCOLM CHERRY, in the ungrateful part of the spy _Carl_, did his work soundly, with a lofty sacrifice of his own obvious good-nature. Indeed, it was a very excellent cast. I should like to congratulate the authors, Messrs. LECHMERE WORRALL, and HAROLD TERRY, on having given the public what they want, without lapsing into banality. The attraction of the first two Acts was not, perhaps, fully sustained in the third, but they gave us quite a cheerful evening; and at the fall of the curtain the audience was so importunate in their applause that Mr. DENNIS EADIE had to break it to them that, though the loss of their company would give him pain, he thought the time had come for them to go away. I did not notice Mr. REGINALD MCKENNA in the stalls, but it was a great night for him and the Home Office. O. S.