"presumably had been born in Pohnpei or in the United States sometime in the 1870s"
Yes, I am aware of that statement. In fact, it was that very document which led me to reconsider the confusing matter of Beulah's birth. I know a lot about Beulah and her family but her birth remains mysterious. Was she, in fact, adopted and, if so, when? Was it in 1877 when she was a newborn or in 1882 when the Logans passed through San Francisco during their furlough to the United States?
The information on Beulah's death certificate came from her son, Logan Tuthill, so there is a fair chance that it is accurate concerning the date and place of her birth: San Francisco, May 1877. The death certificate lists Robert Logan and Mary Fenn as her parents but ....
According to my grandmother, whose information has heretofor proved to be trustworthy, Beulah was an adopted daughter. My grandmother was Beulah's cousin and knew her personally; indeed, Beulah probably lived with my grandmother's family for a year or so in 1893 when Beulah was sent to school in Endeavor, Wisconsin.
On the other hand, it is also true that Mary Fenn Logan was in San Francisco during the spring of 1877, recovering from an "undisclosed health condition." Was the undisclosed condition pregnancy? Newspaper reports have Mrs. Logan returning to the islands in July 1877 with her [unnamed] child. Was this child the infant Beulah or was it the Logan's son Arthur, age six? Other newspaper articles give conflicting accounts of when Beulah first went out to the islands; some say that she was just a few weeks old [1877] and others that she was six years old [about 1882].
In short, Beulah's birth remains a mystery.
