How do you get the stones out of damsons?

Wash and wipe the damsons and remove the stalks. Place them in a large wide pan with the water and simmer gently until the fruit is soft. Press the damsons against the sides of the pan as they cook to help the fruit release their stones. Use a slotted spoon to remove the stones from the pan.

Are damson stones poisonous?

Damson stones contain the cyagenic glycoside amygdaline, a toxin that can lead to cyanide poisoning if taken in quantity (how much?) ... At worst you could save them to toss one by one into an open coal fire as you sip your damson gin round the Winter hearth!