Not sure if this will help, but it may be worth exploring. Is there any chance your grandmother was in America at the time of her nurse training? I suggest you Google beachcomber.news
Historical look at LB hospitals The Longbeach Public health board was established in the 1890's. They built a number of hospitals, which are referred to as LB Hospitals
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Mattress causing back pain - or is it me getting old?? Advice please.