Horning is an ancient village and parish in the English county of Norfolk. Horning parish lies on the northern bank of the River Bure south of the River Thurne and is located in the The Broads National Park. ~Wikipedia.
As can be seen the buildings are very similar to this day. If you turn the street view directly to the left you will see the modern day post office, just a door or two down.
Kelly’s 1900 Directory of Norfolk shows us the Postmistress was Mrs. Lucy Morriss Rope at that time.
The 1891 census shows her in Lower St (as per map view above), when she was Lucy M. Bane. There she is listed as a Shop Keeper and being 48 years of age. A lodger named Frederick Rope was apparently to be her later husband as by the time of the 1901 census she was Lucy M. Rope.
By the time of the 1911 census, aged 67, she was widowed and living in Norwich with her brother.
Could that be her in the black dress ?