So far Y-DNA testing hasn't been helpful, as I have no close matches. However, if you (male or female) have a connection to a Murphy ancestor, I encourage you to consider testing with 23andme. If you do this, we might find more connections between Murphy family lines, rather than trying to connect to a single line of male Murphy ancestors. 23andme has dropped their prices from $300 to $100 making it quite affordable. If you have hit your "brick wall" this could help.