Wow, I just found something fascinating. So I have been trying to figure out what Bonnie was up to between 1910 and 1923 (when she arrived to Bethel with her mother Victoria P. Boyd). Those years are a complete blank, and Bonnie thus far has not been located in the 1920 census. We know nothing about how she came to be acquainted with William E. Van Amburgh and where she lived at the time she was invited to join the Bethel family, much less where she received her education and training in stenography (we do know that her sister Nora was trained in stenography around 1900).
Some things however are known about that period. In 1910, Bonnie lived with her parents in St. Paul, Ramsey, Minnesota. Ten years later Victoria was widowed and living in Houston, Harris, Texas, as the 1920 census shows. Blanch Harbolt (future caretaker of Beth Sarim) moreover lived only a few blocks away and so both would have gone to the same Bible Student congregation. Bonnie's sister Jean also was living in Houston in 1920. So sometime between 1910 and 1920, Bonnie's father had died and her mother moved to Texas. We know it was probably some time before this because her brother John Glen Boyd was living in Temple, Bell, Texas on 6/6/1917, as stated in his WWI Draft Card. He also indicated that he was living with his mother Victoria. But what about Bonnie? I think I've found a reference to her three years earlier:
Temple, Tex. Dec. 6. -- Owing to the fact that his personal attention is being claimed by a lawsuit in progress in Liberty, involving the title to some East Texas lands, in which he has an interest, Governor elect Ferguson will not be able to return to his home in this city before the middle of the present week, probably Wednesday at the earliest. In the meantime a political moratorium is in effect at his offices and no announcements of appointments will be made until his return.
Despite this fact the trail continues to be kept warm by many who are not aware of the governor's absence. The "nothing doing" sign is hung out, however, and most of the number have had their trouble for their pains.
The new secretary of state, John G. McKay, has confided to friends that he has been too busily occupied thus far to attend to the leasing of an Austin residence, but will remedy this defect soon, as he anticipates moving to Austin soon after the first of new year. Miss Bonnie Boyd, who has been private stenographer to Mr. McKay ever since he assumed management of Mr. Ferguson's campaign for governor, will accompany him to Austin to fill the same position there in Mr. McKay's office (The Galveston Daily News, 12/7/1914, p. 3)
This has to be our Bonnie! Here she is in the same city where her mother and brother were living three years later, working in the same profession she would have when she started working for Mr. Van Amburgh. And so she got her start working for the Secretary of State of the State of Texas — that's a stunner! But note how old she would have been. Assuming that she was born on 7/17/1896, this meant that she was only 18 years old when this article was written. This shows that the other birthdates she gave could not possibly have been correct. The most common one was 7/17/1904, which appears in the SSDI and thus likely appeared on Bonnie Heath's death certificate. Bonnie could hardly have been private stenographer of the Texas Secretary of State at age 10!