Help With Three 1930-S Covers

I am hoping for some help with these three covers from 1935-36. While I have an excellent library for 19th century fancy cancels, it is sorely lacking when it comes to the 20s and 30s. Clearly, these are philatelic in nature - no enclosures, no back-stamps, etc. From what little I have been able to find out, the Zebra Missouri Post Office was actually underwater at the time of the cancel! The Bagnell Dam created Lake of the Ozarks, which submerged a good portion of Zebra (little more than the PO and a general store). As for Pine Apple Alabama and Porcupine South Dakota? They existed at the time but...

The historical facts seem correct as far as Zebra, Missouri is concerned, however, the post office continued to exist but was renamed Osage Beach as of March 1, 1935, so technically your covers were postmarked just a few weeks before the official name change:



As for the relocation of the post office in the flooded town, this helps explain it:



Talk about the covers being philatelic in nature, I suspect the addressee of your covers may be the very same Allen Logan who once owned a BLOCK of the Inverted Jennys!

FRUGAL Hetty Green????? Edward Green lost a leg because she spent too much time trying to find a free doctor when she was worth $175,000,000. Supposedly she only had one of everything and wore them every day and washed them every night until the specific articles wore out, then she would buy one new one.
I don't think "frugal" quite covers it.