I couldn't find any
Boston News-Letter stuff from August 1715 thru April 1716, so either they didn't report it, my eyes were too tired to see it in the old print, or news took a year to hit the northeast coast. The latter seems unlikely since Bellamy was already on his way from Massachusetts to "fish ye wrecks" by April 1716 & there's lots of misc documentation in 1716 about the wrecks.
I did find this in my archives - from
The Post Boy dated Saturday January 7 to 10 1715 (which on the Julian calendar was 1716):
King James III arrives in Edinburgh... - RareNewspapers.com
I believe
Madre de Dios could be any of the ships. It's not like they had their names blasted on the bow or the stern.
But now I question whether this is 1716 (even though
Saturday January 7 aligns with 1716). The "infante" Francisco was the short-lived 2nd son of Philip V, born 1717, died 1 month later. However, the queen had a miscarriage in January 1715 just 1 or 2 months into pregnancy, so now I'm really confused. Maybe this entry has nothing to do with the 1715 wrecks?
Then again...
If it is 1715 (reporting on ships lost in 1714), perhaps
Madre de Dios was one of the many ships Ubilla lost while languishing at Veracruz?