I have loaded our Watson ancestors into the the WeRelate Wiki, but have not done the Mayhew family yet. If you do a family search for George Ralph Watson or Jane Mayhew, you will be able to browse the tree. I have also included a picture of them.
You can start at WeRelate.org. If you register as a user, you can email me. Go to my User page (you can do this by clicking on my name (RGMoffat) anywhere you see it). Under the More menu in the upper right column, you'll find Email this user.