Sad to say don't get your hopes up too high.
The truth is, by my A list experience flying SWA, is that the "lost and found" experience is more a miss and only sometimes a hit. I estimate a 90% negative vs. 10% positive scene @ SWA for recovery of such SMALL items left in seats or seat backs. Baggage is totally different. The reason I say this is of personal experience and to tell the truth,,, and the truth is... that seat and seat back "lost small items" tends to be discretionary to whomever comes across it first. I would expect it is up to the discretion of the "other SWA personnel" discovery of the items after the flight attendants depart the plane. (to report certain items found ESPECIALLY during the cleaning of the plane after the last flight of the night.)
My heart breaks for your irreplaceable journal and I do hope it is reported and you are contacted.
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