The Chofetz Chaim on Reb Lipa

It is told that the Chofetz Chaim, Rav Yisroel Meir HaKohen of Radin, once spoke at length about the laws of Kodashim with Rav Eliezer Moshe Horowitz, who was likewise deeply versed in that part of Torah.

Afterward the Chofetz Chaim was asked whether he had ever met anyone else who knew the subject as he did. He replied that Reb Lipa of Mir, who was also a kohen, knew it better than he. "He could walk into the Beis HaMikdash and perform the avodah with his eyes closed," he said.