The Voynich Manuscript as an Iberian-African Voyage Record

[rikforto]

This is going to run into the the problem of discrimination; how can any of this evidence show your theory uniquely? To focus on the artwork you link as an example, those are well over a century after we think the manuscript was drafted and from a very different part of Europe from Portugal. Nudity is pervasive in Western artwork over the centuries and does not uniquely mean "Africa", even if she is represented that way in some distant art. There are fairly big differences too---a lot more nymphs than just one, and few other clues they are meant to be African.

To give a sampling of other problems I see: Codes were used outside of Portugal, and did not look like the Voynich inside the Portuguese navy. The plant identifications are famously hard to get a consensus on. The jars have European precedents. The structure of the Voynich does not match the three-part nautical reports you say it does very well at all.

A more careful comparison with period Portuguese evidence might answer some of these concerns, but you're going to have to find documents and do the comparison for this to seem all that convincing.

The similarities here seem very superficial to me, but if you think they are obvious, you shouldn't have any problem coming up with a lot of detailed examples from the right time and place and convincing people and I encourage you to do that

Finally, and somewhat unrelated to your thoughts on the origin, whatever Voynichese is, it is not a homophonic cipher because it has entirely too few characters for that.