The loading lever problem was identified early in the use of the Walker and a redesign was quickly coming.
Although all of the original Walker's used the hanging spring method of keeping the loading lever up, there was a second version of the pistol which is now called the "Colt Whitneyville Hartford Dragoon".
This version was made in late 1847 and it had several differences.
The grip/frame area was changed, the cylinder was slightly shorter and the loading lever had a spring loaded latch on the front of it which mated with a corresponding lug hanging off of the bottom of the barrel, much like the later Colt pistols.
I think Flayderman, author of :Flayderman's Guide..." must have never fired a Walker or a modern Walker reproduction.
He talks about the grip and cylinder but makes no mention of the loading lever latch even though the two Whitneyville Hartford Dragoons shown in the "Flayderman's Guide to Antique American Firearms...and their values" both have the revised loading lever.
Had he ever fired a Walker, that new latch would have been one of the first things he mentioned. :rotf:
There were only about 240 of these Whitneyville Hartford Dragoons made so they are rarer than the Walker. If you find a nice one, expect to pay well over $60,000.00 for it. :grin: