Help in Locating my Great grandfather - Ludwig Stäbner

[stnr63_236]

My great grandfather was Ludwig Stäbner. According to information provided by my mother before she died, he was born on March 1st or 21st, 1823 in Posen, Prussia.
He immigrated to the US in 1851. I have a Certificate of Arrival for a tailor (his profession) named Ludwig Stäbner traveling from Hamburg, Germany arriving in London, England on June 13,1851. That records states that he departed 6 months later for the USA. To date I have not located any travel documents for his travels from London to the US.
He applies for US citizenship in the New York Court of Common Pleas on January 13, 1852. This event tracks to his departing London within the 6 months noted on the Certificate of Arrival noted above. He is granted US citizenship on August 10, 1857.
Any help in locating information about him would be greatly appreciated.