Sorry, I have too many balls in the air. But I have more time now. I was on Robert's profile and was reading the naturalization paperwork, thinking that the dots don't line up. Robert was a Groskin when he arrived in NY in 1908 but his wife was neither Henrietta or Marion. She was Essie Minnie Grosnik.
In the naturalization records Robert says he entered the U.S. at New York in 1911 seeking permanent residence, his first two children, Lillian b. 1908 and Cecilia b. 1912, were both born in South Africa. Then Max b 1916 and Minnie b. 1918 in Pennsylvania. The paperwork was done in 1940 so his memory wasn't so great.
But his immigration record (1908) shows Isaac Reuben Groskin , Citizen of England (this must be an error, unless he resided in Southhampton, England for some time before immigration), Race: Hebrew, last residence was Clermont South Africa where they stayed with family. He was traveling with his wife Essie Minnie Groskin age 25, b. 1883, and two children, Chai? Liha? Groskin age 2, b. 1906, Feigi Terne? infant <12 months b. 1907/8. (assuming these are Cecilia and Lillian)
So Isaac would have left England before 1906 if both children were born in South Africa. He was 20 years old in abt. 1900, so he left Lithuania (which was part of Russia until 1917) sometime between abt 1900 to 1905.
Essie Minnie Grosnik died in Pennsylvania sometime before 1922, which is the date that Robert remarried to Sarah.
This is interesting http://www.familysearch.org/ark:/61903/1:1:QGPR-N74N