A sad affliction has befallen Rev. and Mrs. Robert Graetz, formerly of this city, and who recently carne to Ann Arbor from Arlington, O., on a visit. Mr. Graetz and his family, consisting of his wife and twin babies, arrived in the city, Wednesday, last week, on a visit to Mrs. Fred Kannenburg, of North First street. They were scarcely here, before a dispatch was received requesting Mr. Graetz's immediate return as his brother was critically ill. He at once left for the bedside of the brother. Thursday morning one of the twins was seized with cholera infantum and professional skill was unable to save it, the little one dyingat ii o'clock. A dispatch of immediate recall had in the meantime been sent to Mr. Graetz, whose I return Friday was a peculiarly sad 'one. It found him childless, the second infant having been attacked soon after the first and by the same disease. It lingered till n o'clock p. m., and then passed away. The bereaved parents will ever ha'e sad cause to remember their visit to Ann Arbor this season.