I am looking for the locations of two towns in 1910 Russia. They are listed as Dolowicz and Nalkozile (spelling is unclear) in this passanger manifest from Hamburg
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When they arrived in America, the towns were recorded in this way:

Any help would be greatly appreciated! I have been trying to find information about my great grandfather's origins for many years. He died in 1923 in a mining accident when his children were very young, so there are no family memories to draw upon.