If you have walked or ridden your bike through West Laurel Hill Cemetery from the entrance just off the Cynwyd Trail all the way to the Pencoyd exit on Righter’s Ferry Road, you have probably passed dozens of mausoleums and gravesites that you had questions about.  Now there’s an audio narration to help you quench your curiosity.  It is done by Joe Lex, the same person who researches and narrates Laurel Hill’s twice-monthly podcasts “All Bones Considered: Laurel Hill Stories” and “Biographical Bytes from Bala: West Laurel Hill Stories.”  Find out about William Luden, inventor of the mentholated cough drop; Charles Harrah, who made his fortune in Brazil; Eldridge Reeves Johnson, inventor of the Victrola, and many more.  And at long last, you can discover the mystery of “Cocktails at Six.”  The tour covers only people interred on the right-hand side of the road and takes about 40 minutes.  Look for its companion audio covering the other side from Pencoyd back to Barmouth in a few months.