Dear Wally,
I have been having a little look at ancestry and family search and found the 1891 England Census for Helena Putz, Head Nurse , born in Dusseldorf, aged 28, at Royal Alexandra Hospital for sick Children at Brighton, Sussex.
the 1901England census says she was Matron at Junction Road Cottage hospital, Andover, UK and a Naturalised British Subject. aged 36 so making her born c1865.
I then found in Family Search but unfortunately no date
Helena Puetz born to Robert Puetz and Elisabeth Takaberg, born Duesseldorf, Staat Rheinland,Prussia.
Index C98808-2, System Germany ODM, Source 937469. Germany Births and Baptisms 1558 -1898
So this is Helena. I also found her record in the National Probate Calendar.
I can't seem to find anything on Robert except for his marriage to Elizabeth Tackaberry.
Sorry if you already had this.
Best wishes,
Joanne. (In the wet UK)