00894    a2200193   4500001000700000020001800007020000900025041000800034082001000042245003500052246002500087490003500112520041900147856002400566040002500590260003700615300001700652700003100669118600  a3318908440879  qenc.  aeng  a[Fic]10aThe Hardy boys mystery stories  aThe mark on the door  aThe Hardy boys mystery stories  aIn their motorboat the Sleuth Frank and Joe Hardy search Barmet Bay for a dangerous stranger who has stolen a valuable boat. Suddenly, in the eerie fog, they spot the craft drifting aimlessly out to sea. What happens next starts the young detectives and their pal Chet Morton on an intriguing adventure that takes them to Mexico and into the comparatively unexplored desert and mountain regions of Baja California.  u000031/00003157.jpg  aBR-BrIDEAcBR-BrIDEA  aNew YorkbGrosset & Dunlapc1995  a180 p.bill.  aDixon, Franklin W.eauthor