I'm posting a query on behalf of Joanne Briggs, in the hope that someone might be able to help her identify a fresco of a blind man with a dog (or at least a fresco that may in the past have been interpreted as such):
"Perhaps the source I have used is referring more to paintings in Pompeii than in Herculaneum. I will give you the source utilized, and the quote, and if you can shed further light on this I would be most appreciative. The book is entitled "The Buried Cities of Vesuvius: Herculaneum and Pompeii" published in 1895 by Hazell, Watson and Viney, Id. London. The author is John Fletcher Horne. The quote concerns the typology of Pompeian paintings and one in particular that depicts "a blind beggar being led by a dog and asking alms of a lady.""