How to deal with a family history "treasure" hoarder

Years ago when I was a college student in Ohio, I was warned about "Adelbert". Adelburt was a local character, known for throwing outrageous parties, and was a direct descendant of a major royal family through one of the lesser lines. And Adelbert loved to hold court. He was, how do you say, a unforgettable. Adelbert's house was filled to the gills with antiques, newtiques and just plane weird stuff. But one things Adelbert had were pictures of his famous ancestor who reigned over a western European country for many a year. Somehow I found myself a guest of Adelbert's through a neighbor of mine who knew someone who was in Adelbert's inner circle. Lucky me. Right? Meh. So I had the chance to visit with Adelbert and I said "This is an amazing collection you have of your ancestor, chit, chat, chit, chat..." Adelbert told me all about his search for this ancestor's image, how he was related, and then said that "whenever a univer...