I am not sure that they really censored "Race to the South Seas", they just lost the original print.
No photostats with the original art survived and apart for a few very old reprints, all publications up to now use a 70s Dutch version that was retraced from the original comic-book.
In fact, Gemstone will publish a restored version that is the closest to the original in a special book to which I contributed to by providing scans of an old French reprint that used the original art (I am not affiliated to Gemstone).