I can't state for 100% certainty. Maybe I'll become a mason (I am a legacy technically and have the ring to prove it), and then I can report back to you guys.
Regardless, I think the history of the early 20th century was ripe with secret societies and symbolism that honestly was not really considered a big deal. Remember they were using the cross back then as well. It simply wasn't an issue. Even if he was, it was most likely as a cultural mens club, and not a sophisticated conspirital group.
This iobsession with Masons and Illuminati confounds me. It comes from the understanding rightfully so that very few people contain most of the worlds power. But I think we are blowing up the organizations just a bit. And why would you correct someone that thought you were larger and more menacing than you actually are? You wouldn't! :)