Mysterious Rubber Blocks May Hold Link to Ship Torpedoed in 1917

[Jimbuna]

Interesting and the most plausable IMHO:

Ms. Williams was contacted by two sources, who wished to remain anonymous, who said that a salvage company been working on the wreck and in the process of recovering other cargo had displaced many of the gutta-percha blocks and other rubber cargo, which has also washed ashore.

http://www.oldsaltblog.com/2014/12/t...miyazaki-maru/