Oh - are you also referring to the days when bird "guano" was transported in leaky cargo sailing ships and had to be "Stored High In Transit" . If it wasn't, it would get wet, decompose and generate methane in the hold so that when a sailor took his lighted candle down in the hold to check the freight......... BOOM!!
(How we have progressed in aviation.)
P.P.
Edited to say: The initials were stamped on every sack of Guano transported in this way.