Surprisingly, used stamps with cancellations of Lithuania during the Imperial Russian rule are somewhat harder to find than covers from the same period. At least it seems to be so to me. Cancellations of Vilna/Vilnius are still findable if you look carefully but other regional towns are pretty rare. I guess I must check patiently one by one, taking time... Anyway, here are my lastest acquisitions.
This is a stamp with a 1910 cancellation of Кельмы/Kelmy, now Kelmė, Lithuania. It's a town in Šiauliai County with a population of 10000. Kelmė during the Tsarist time had a large number of Jewish population.
This stamp has a cancellation of Ворне/Vorne (now Varniai, Lithuania) Ков(Kovna gubernia). Varniai, with a present population of 2000, was the seat of the Samogitian Diocese. The first book of lithuanian language is believed to be written here.