Just a little info about the area you are referring to. Cowan Pond is now known as Coan Pond, located in the Town of West Amboy. If you search Town of AMboy maps you will find an old topo map with names, Coan Pond is shown North of West Amboy as Upper Pond. On the south side there were two Spicer families, one of W.J and another D. Spicer.
The reference to the minister Owens was from Williamstown. I have not found Owens Grove but it may show up in time.
I spent 8 summers working at the Boy Scout camp on Coan Pond and will share any info that I have on the area that you might think I can help with.