POOR ROSA MARTENS.Insane, Married, Insane Again, Recovered, Deserted by her Husband, Dead.From the New York Sun.Rosa Martens, a young black-eyed Jewess, was brought to the insane pavilion of Bellevue Hospital on Aug. last suffering from melancholia. She was beginning to improve when, in a few days, an elderly mancame anti took her awav, contrary to the advice of the doctors. In less than a week the patient was returned to the hospital by Frederick Arndt. She said that she had been married to Arndt three days before. Her disease became more pronounced, and she tried to choke herself to death. Dr. W'ildinan said that under the circumstances marriage was the worst thing that could have happened to her.Arndt is 20 years old, and is a bi*oker employed by Charles Egler, at 255 Third avenue. Arndt lived with the Eglers, and according to them was nearly crazed about his sweetheart. He said that when he was absent from her she would become uncontrollable, but when he was with her she would le ierfeotly rational. He did not want to postpone their marriage, on account of fear of making her condition worse, and he was afraid of what the consequences would be if he married her. Arndt was filially convinced that marriage would dissipate Rosa’s insanity. Marriage had the contrary effect, and, after being taken back to Bellevue, Rosa was taken to Blackwells Island Insane Asylum. She improved, and i about tiva weeks ago Arndt obtained her release from the asylum and went with her to board at Philip Bauer’s house, l.'H) East One Hundred and Tenth street. But in three days, for some unknown reason, he deserted her. Rosa became despondent. She said that since her husband had left her she did not care to live. The Bauers thought of returning Rosa to the asylum, but they felt that Arndt might appear any day, and did not like to take the step.