There's a couple of clues that may narrow it down very slightly. There are two references to Pennsylvania (Allegheny and "Pittsburg" [sic]) so this may be from a Pennsylvania newspaper. Allegheny was absorbed into Pittsburgh in 1907 [
wiki ], so listing it as a separate place name for the business location in that ad might place this story before then. Also the spelling of Pittsburgh without its final "h" largely took place between 1891 and 1911 (or 1921 for one specific newspaper) [
wiki ], perhaps giving us a bracket time of 1891 to 1907.
The syndicates active near that bracket, I believe, were Oak Island Treasure Co. 1893-1899 (?), and Old Gold Salvage Company 1909-1911 (?). OITCo. discovered the so-called Chappell Vault in 1897, I think, found with a drilling pattern from a platform at 100 feet deep in the Money Pit, right after pumping out the latest flood to tide-level ... so that would adequately match the description. Fullerton perhaps replaced Adams Tupper after the New England faction took over the syndicate. Oh and what do you know,
oakislandmystery includes a
Fullerton amongst the OITCo personnel who found a southern side flood tunnel. I think we are on the right track. The news item's reference to a "huge box" may be describing the Chappell Vault, and as we know, further attempts to get at it failed.
--GT