I think we all agree that there is something there and it is most likely of archaeological interest. The big question is which period it dates from. The axe means nothing really. If I found on in my garden it wouldn't mean that my house is Bronze Age!

The mound is so obvious that it must have been recorded somewhere. Was there a manor in the area? Is it a bit of sympathetic landscape gardening? Did someone want to mirror Silbury in their garden?

Much research including a study of old maps is the answer, I think.