It seems apparent to me that the colours were added to the illustrations at a later date, probably by someone's child using the manuscript like a colouring book. A dead giveaway is the way alternating segments have been coloured in flowers to present a pretty pattern rather than realism.

The 10% of the general population who are left-handed don't seem to have any problems with it. Also, my experience around artistic types in the music industry makes me suspect that among professional photographers you'd be likely to find a significantly higher percentage of left-handers than in the general public.

Since when has Spain been a developing country? It's part of Western Europe, and an incredible place to visit.