Henry Thomson Tonsberg 1867

I am looking for details of my great grandfather - Henry (maybe Henrik) Thomson (T*****n). He arrived in Australia in Melbourne in 1890 in the ship Henry Buck from San Francisco. He was probably a seaman. He was originally from Tonsberg in Norway He was born Tonsberg/Horten in Noway 1867/1868. Can some one help me find who his parents were.