Miss Mary B. O'SULLIVAN, a native of this city, has been appointed one of the board of visitors of public institutions of Boston by Mayor Matthews. The Boston 'Globe' has a sketch of the ladies and gentlemen appointed. Miss Mary B. O'Sullivan was born in St. John, N.B. and is the second daughter of John E. O'SULLIVAN, a highly respected resident of that city. Miss. O'Sullivan received her early education at St. Vincent's convent and later attended the public high school from which she graduated with the highest honors. Her aspirations were to become a public school teacher and she immediately entered the Normal School, where she soon distinguished herself in her studies. Miss O'Sullivan, although but 15 years old, began her career as teacher and was appointed principal of a large public school in Fairville, N.B. The popular young teacher was next appointed instructor of St. Malachi's School in the city of St. John, which position she creditably filled for eight years.. When in St. John the gifted young woman contributed articles to the 'Educational Review', the 'Free Press' and 'Progress' and her short storeies written for the 'Waverley' and other publications in Boston showed her ability as a writer. Two years ago, Miss O'Sullivan with her family came to Boston. About a year ago she began writing for Donohoe's magazine and is now a member of its staff. Miss O'Sullivan resides with her father and sisters at 52 Delle Avenue, Roxbury where in her cosy and picturesque study she can be often seen sketching illustarions for her stories. Miss O'Sullivan is a charming conversationalist, but has a faciniating manner and is naturally witty.