The Directors of the Aquarium are to be congratulated on their new departure, which takes the form of a highly exciting and sportsmanlike contest between those two well-known entertainers Professor HERR KOMER and Señor HARDLI DUDDI in their great poster-painting exhibition. This consists of a trial of strength and endurance, the challenger, Señor DUDDI, having given out that he will beat Professor KOMER'S previous record in time and area combined by one hour and a hundred square yards. As the public are well aware, the latter performer's sensational achievement, "_Miss Letty Lind_," stands at present unbeaten as an artistic poster, having far eclipsed his "_All Beautiful in Naked Purity_," which attracted such attention on the Royal Academy hoardings last year. As to time, his LIND _tour de force_ (shown at the Society of Portrait Painters at the New Gallery last autumn) was painted in one continuous whirl or sitting of fifty hours duration, and would have taken even longer, had not the accomplished _danseuse_ fainted from exhaustion. (It is understood, by the way, that Miss LIND has issued a challenge that she will pirouette against the world, including Lord YARMOUTH and Little TICH.) Señor DUDDI has hitherto made his mark with presentments of ultra-_chic_ young ladies, which have certainly taken up a great deal of space, and fulfilled their purpose as "eye-openers." We have no details as to the time in which they were designed, but we should think about twenty minutes on an average. As the Aquarium contest will not be concluded until after we go to press, we cannot give the result, but at the time of writing, after three days' painting without cessation, Mr. KOMER had covered a quarter of an acre of canvas, while Mr. DUDDI had traversed three hundred yards of advertisement hoarding. Both were going well and strong, the only people showing signs of exhaustion being the umpires and spectators. _From the "Sporting Times."_