Valka prepared a stash in Agroprom after the Second Emission, shortly before his death.
Shadow of Chernobyl
Yeltyshev is mentioned in a stash description.
- S.T.A.L.K.E.R.: Clear Sky, configs/text/st_treasures.xml, string id "st_agr_q5_n_descr": After the last Emission, Valka Squint, God bless his soul, hid something inside this old stump at the corner of a fence.