McCallion address

You are trying to find the modern address your family lived at in Bellagherty. In 1901 the address was simply Bellagherty. No street names and no house number. A letter addressed to Mary McCallion, Bellagherty, Magherafelt, Co Derry would get delivered. The postman, and anyone else who needed, would know where the McCallion household was in Bellagherty. (Bellagherty is 424 acres in size and in 1901 there were just 33 homes there. Easy enough to know everyone). The numbers shown on the censuses were the enumerators' private numbering system, designed to ensure they visited every household. They varied from census to census (each enumerator probably taking a different route) and the enumerators' records are long destroyed.

Street names and house numbers in rural areas were only introduced in the 1950s, and even today in some places there are none. The townland plus a modern Zipcode suffices.

What you have to do is locate the property using Griffiths Valuation maps. They are on-line on the Griffiths site. The Valuation Revision records for the years 1899-1915 are on the PRONI site and show Mary McCallion having plot 10b (just over 21 acres). The Griffiths maps show that on the modern Bellagherty Rd. The buildings were near the public road and the land stretched off to the east. Griffiths contains a modern satellite view and it's pretty easy to locate the farmland today. I am not sure there are any farm buildings left, and I suspect that the land has been merged into what was plot 13a, immediately adjacent.

So I can't give a modern street address for the McCallion farm because it almost certainly never had one.

There look to be some modern buildings near the McCallion farm. You could try knocking on doors there to see if anyone has any information on the farm.