Philip Nowlan - where are you?

Perhaps I have yet another brick wall in my family tree research.

My quest to find "baby Philip" appears to have failed, thus far.

See related posts: my search for Philip and his grandmother's story.
I don't know if it's too soon to call it a failure, really.  Perhaps I'm just impatient.

My letter to a potential Philip was sent December 15th.  Thus far, I've heard nothing.

Nada.

Zip.

One would hope that if the letter arrived at the wrong  Philip Nowlan's home, he would have the good grace to send me a quick e-mail to let me know that he was not the person for whom I am searching.  If it landed in the hands of the right Philip Nowlan, one would hope he would let me know that too.

But how soon after receipt of the letter should one expect a response?  I know I would jump on any such communication, should I receive one.

So, Philip Nowlan, born June 1957, to mother Joan (nee Danaher) Nowlan -- where are you?  I believe your father's name was James.  I know, from public records, that you have at least two sisters:  Teresa, born September 1962; and Donna, born September 1963.  From those same public records, I know that Teresa has a daughter, Jessica Faye, born about 1980.   I also know that your mother died in October 2004.

I don't know how much the Nowlan(s) know about their Danaher/Docker/Gizzard family line, but I would dearly love to share what information I have with them.  Surely, they're curious.

Philip Nowlan, if you're out there, contact me.  Please!