I have seen the photographs. Until I visit again next week, I do not know if there is a property the other side of the post office, or if it is only farm outbuildings. My hunch is a semi-detached cottage, which is next door and shown in the photographs. It is now called Fuchsia Cottage and probably not original. The only issue is a path that runs between the old post office and Fuchsia Cottage and another the other side. On present maps, one building now makes Leggy's pasties. When the property is described as being next to the post office, but in which direction?
I do not have access to census records, apart from in the library, and do not know how to search for a road, or row of houses. Establishing the neighbours, or even more houses, their names may not have changed and it would also confirm the direction. If looking at the old post office, to the left, there is Trewarder Farm and possibly a house between, but no more. Right of the post office there would be many houses.
Starting this search the other month, I contacted the owners of the present post office/general store looking for Glebe Cottage. Their reply said they could not help as they had only lived in the village for 5 years. They did not mention the local history group that meet there the 3rd Tuesday each month. I am now aware of the group and hoping to meet with them next week.