Did Rav Blau meet the Schochets?

According to R' Avrohom M. he did:

I believe that your zeide went once to visit his parents in law, during the engagement, Poland and Lithuania were then nominally at war and you could not travel from one to the other. He took the train to one side of the border, ran through bushes and waste land across the border and walked to the nearest station in Lithuania and took a train to Tielsiai/Telz, and then back the same way.