The British Library published a gazillion pictures…for public use.
These are a few having to do with guitar… The association seems to be with gypsies and vagabonds. This is part of the soul to which guitar appeals.
All these images taken from various pages of ‘L’Espagne … Illustrée de 309 gravures dessinées sur bois par Gustave Doré‘
You can browse the collection at https://www.flickr.com/photos/britishlibrary/