Your bottle looks like an ordinary medicine, does the seem stop before the top? The # 8 on the bottom is the bottle mold #. That rock pile seems to be a dump / rick pile combo. The only survivors will be small bottles. If you are going to dig it, start from the edge and work yourself into it, dig to the solid ground. I would also search the area to locate where the house was, many times the real dump was not to far from the house. Be careful of deep wells ...All the best !! Dont forget your gloves and also a digging tool.
I the house still exist in fact it was built in 1802 and it is a house that is our cottage which we can live in it is all refurbished now hear is a picture
Yup find the Privy!...don't discount that under the rock / garbage dump there may be unbroken stuff. pick a 4X4 square at the edge and remove all the rocks and have a dig....Looks like fun!