Mr Frank John Goldsmith & family boarded Titanic at Southampton on April 10 as Third Class passengers booked on ticket number 363291. As far as I know, no mention of their cabin allocation has been made. I couldn't locate anything on it, but not to say there isn't.
See this message board thread. in which a relative asserts the following:
"what he [Frank Goldsmith, Jr.] did tell me was that their cabin was across the hall or aisle from second class cabins on the starboard aft side of the ship. It accommodated both his parents and him."
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