Sadly, Mr. Isaac Leo Kram, the grandfather of my beloved friend Rav Dovid Kram Shlita, passed away last week. He was one of the tzadikim of the generation. He went through the holocaust and survived both physically and spiritually. His diary is required reading. On page 8 he talks about Pesach in Buchenwald. Here is the link [if it doesn't work please tell me].
Please read.