August 1847...Wasn't Capt. Walker chasing Mexicans around in Texas? Purdey No.4236 looks like it survived the Alamo. Not tobe rude, but, that little 'Gem' should be thoroughly examined. Every measurable surface should be checked, How deep is the pitting surrounding the fireing-pin holes? Has you local Gunsmith"Viewed" this gun?What is the date of Proof?(Its stamped on the r/h bbl.flat.have the BBls been worked on since the date of proof? The Gap at the 'Nose-end of the bbls' is not "Original"..I sincerely hope you have many hundreds of"Happy Rounds'go flawlessly "In from the breech, and out from the Front".(161 Yrs old and still going")'Lot to be said for those old London bastards with their Gas-lights and' dripping-butties in their lunch buckets. I'm glad Unsworths Purdey book is getting some Credit, he "Busted his Limey Butt doing that Book.cc/DT.