Mary Osborn was born in 1824 in Harpenden, Hertfordshire.
1881 Census
Mary is living at the school in Llandegley and her occupation is listed as Elementary School Teacher.
She is married to George Osborn who was born in St Albans, Hertfordshire in 1814.
His occupation is also listed as Elementary School Teacher so we can assume that they both worked at the school at this time.
References:
1881 Census Reference: RG11/2609 Folio: 39 Page: 2