Candi- first of all, welcome to the forum- glad to have you here. When you get a minute, drop by the introductions thread and say hello.
Now as to the shotgun- you are not holding it close enough to the computer.
PIXELS MAN! We need PIXELS! That is, hi def photos/. To see details, we have to enlarge pics. Without hi def- lotsa pixels, all we get is a big fuzzy pic.
The other thing is markings. On most top break shotguns, markings are inside. Remove the barrels, and there should be marks on the concealed underside of the barrel, and the concealed flat part of the frame (called the water table)
Your shotgun MAY be English (they seem to love those skiiny assed toothpick stocks) and there WAS an old time English gunmaker named Leech.
Get us some pics of the markings, and we can go from there. Oh- about Mr. Leech-
William Leech moved from St Martins in the Field, London to 20 Duke Street, Chelmsford in 1794. There he started up his gun maker's shop. Later he moved to 3 &4 Tindale Street, Chelmesford. Percy Leech, the last family gun maker, trading under W Leech & Sons, sold the business about 1948. The new owners continued to trade from the shop in Tindale Street until 1984. W Leech & Son still continue to trade up to this date from other premises.