Hi Cr,
I have checked the copy of the birth certificate for Arthur and it does say June. The certificate is a hand-written copy, not a scanned image of the register entry, so it might have been mis-transcribed onto the certificate. So either June or July could be correct. Therefore, need to keep an open mind regarding his dob.
John Joseph CURWOOD was born in Jersey, Channel Islands, as were his 9 siblings and parents.
A young brother to John, George Alexander (1840-1932) emigrated to Montreal Canada in 1875 and died there.
An even younger brother to John, Henry William (1848-1908) had a son Thomas Charles (1883-abt 1973) emigrated circa 1903 to the U.S.A. Passenger lists destination Hamilton (1903), Buffalo (1908), Pittsford New York (1914). 1930 census in Mendon New York.
So Arthur could have been visiting his uncle George on his Canadian trips, or his cousin Thomas on his U.S.A. trips.
The Arthur you mention on the 1939 register address in Worthing dob 08 Nov 1867 as Arthur S Curwood is Arthur Samuel CURWOOD, born Uffculme Devon, died 1943 Newport, Monmouthshire, residence in Richmond Surrey, eldest son of Samuel and Jane (nee KENT). A completely different line of Curwood's.
Now, you have raised an interesting situation.
The June 1929 passenger list for Arthur, stated age 51, gives the destination as 49 King Edward Avenue Worthing which is the same address as the Arthur Samuel on the 1939 Register. So, either the age is incorrect on the June 1929 passenger list, (should be 61 to match Arthur S.) or Arthur was going to stay with Arthur Samuel. You say "there is another record of this man going out to Canada 3 Feb 1929 from that same address aged 61 (presume age was recorded wrongly)".
On this evidence, I am going for :- the age on the Feb 1929 passenger list is correct; the age on the June 1929 list is incorrectly stated as 51 it should be 61 and is therefore not the Arthur the son of John Joseph; as I very much doubt there is a very close relationship between Arthur and Arthur Samuel. There may be a distant relationship but it will mean joining our two Curwood trees several generations back.
Hopes this all makes sense.
Les.