BIG jar...prick damsons with fork of tooth pick and half fill jar with fruit...half of the amount of fruit sugar (eye measure by looking at the jar)....fill the jar with gin.
First week shake the jar everyday to disolve the sugar and to get equally troughout the liquid.
After that shake the jar when ever you remember...once a week perharps.
Keep it 'soaking' for 4-6 months...after that strain the 'gin' into bottles..eat the fruit and keep the gin maturing for another couple of monts or so, minimum.
Next christmas..drink the gin..sipping little now and then..for medicinal purposes only.. ;)