Does he even discuss drug smuggling in them? I thouht he always denied that any of that was going on.
There have been some people who claim to have seen North partaking in these operations, but the problem is, the witnesses are convicted drug smugglers, who aren't always the most credible people. LoL.
North's journals were not declassified until the earily 1990's, I believe they were declassified in 1991. If these journals were made public during the Iran-Contra trials, the outcome and aftermath may have been different. Who knows for sure.
So in short, there is primary evidence showing that North was aware of the Contra drug-smuggling, but there is no credible evidence out there showing that North was directly part of these activities.