Thanks New_guy,

The seller may have already answered one of my other questions.

The Heym sidelock is one of the other guns I'm considering. Since he's looking to make the trade, I would assume the Heym handles comparably or better than the Wm. Douglass.

I like the look of the mid-grade British boxlocks -- there's an Army-Navy and a Manton for sale in the same price range as the Wm. Douglass -- but reading some of the travails of other members of this forum dealing with 100-year-old steel makes me lean toward a more recently built gun.