Various articles researched and collected by Frank MacDonough.Red plastic folder, continuous ring gripped with printed pages containing information about Sinking of U-168 by HNMS "Zwaardvisch" & subsequent imprisonment of Captain Pich and Officers at Dhurringile.U- 168german u-boat 168, captain helmut pich, indian ocean grey wolves, hnms "zwaardvisch", lt commander goosens, catalina flying boat, captain detmers, major bertram, german pows dhurringile, books, military