i said, "well, why'd you buy the clyde barrow?" me, "well, i felt they should stay together." >> the sale of the bonnie and clyde guns suggests to earl that his father's collection is worth every bit of the $4 million he's been told. he plans to gradually sell off most of it. and so robert davis's 50-year love affair with texas memorabilia certainly has paid off. still, earl has his regrets. >> even though we may get a good monetary reward for it, you know, it's like a piece of my dad. so, you know, as i see things that aren't there that were there, hey, maybe a tear comes to my eye, and then i'll just -- you know, "good old dad -- i wonder what he's thinking." he would have never sold. >> earl describes his father, robert, as especially proud to own the map that mexican general santa ana used in 1835 at the battle of zacatecas. but in the 1960s, business was slow, and robert was forced to sell it. but every time robert looked at the bare spot on the wall where the map had hung, he wished he had it back. it took him years and quite