Hi Justin,

if the attached pic shows the family in Oakland in 1880 ( ancestry reads Bosten surname, but - with father Frank born Austria and mother Florence born Mexico - I think it should read Coster a mis-understood Costa some name names are written a bit unn) there was a son Frank born 1871 or 1872, maybe he also died before 1900. I cannot decipher Frank´s profession. Maybe there was a brother or uncle Nicholas who knows.
Regards,
Thomas