Does Souter's silence on hiring mean he's leaving?

I think that Justice David Souter's lack of a decision for his law clerks does indicate a lack of uncertainty as to whether he wants to continue on the Court. If this is the case then we are going to see a string of Supreme Court Justices that will allow President Obama to take their places. It is just a matter of time before three of the liberal leaning judges decide to retire and for Souter to not have named his clerks indicates that something is up. Unless he is letting his current law clerks continue their service to him for another year, it does not seem like a practicle thing for him to do if he does want to stay on the bench because once clerks get the job they really have to get into the research mode for their bosses. When we went to watch the case at the Supreme Court, I did not notice anything unusual from Souter that would have demonstrated a lack of interest or desire to move onto something else in his life. I can imagine that he feels it might be time to step down and give the position to someone who can continue to serve for years to come, but he still does have his good mind on him and I would like to see him wait a few more years before succumbing to retirement.