Tacing Jacob Bloom immigrated from Lithuania in 1905 #lithuania

Jim Bloom

From census records I beieve  that my paternal grandfather, Jacob Bloom (who likely amg;changed his name prior to emigratinig) immigrated from Kovno via South Hampton England) inn 1905. But I don't know the name of the ship and the exact date. 
I suppose the next step is getting records from Ellis Island. I assume this was the only port of entry for immigrants at that time. Of course the 1910 census depended on the accuracy of the interview. O have no living relatives who can help me with this.Thanks for any information or suggestions.

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