Hi All,
Just a suggestion.
If Sarah died as widow of Heise under the name Paul in 1954, and Julius the son died of syphilis 1904 , then one would presume that Gustav was the one that passed it on to his son. As this is a horrible disease he probably died in a hospital/asylum., and could have been in and out of one for years.
Possible death;
Gustav PAUL aged 42, Edmonton 3a 371
OOPS in 1904