Discussions

I'm going to be doing some tree planting shortly and would like to make sure they are within our property. We live right in the city on a triple lot with no fencing at all. I was told that there should be brass stakes at each corner of our property but they maybe an inch or two under the lawn. I refuse to pay the money to have someone come out and stake it for me but was wondering if anyone has a way that I could find these stakes as I can't see any on the surface??? Ideas???