I see that this post is nearly 9 years old, but there is a chance that you may still be out there...
My surname is Halley, and my ancestors emigrated from Topsail, Newfoundland. My great-grandfather was Edward Halley, but I don't think that it is the same Edward Halley who is your grandfather. It is likely that they were cousins or second-cousins. My grandfather (John Thomas Halley) was born in Springfield, Massachusetts in 1900. His father, Edward, was possibly born in 1871 in Topsail. His mother, we believe, may have died in childbirth. Her maiden name was possibly Neville, daughter of Gregory Neville of Topsail.
Any info you might have will be welcome; and I will be happy to share any info I have which may interest you.