Were you the FIRST person to find Warren Robinett's signature in Adventure?

As Mr. Robinett has said, if you found it on your own, without ever hearing the stories of the hidden signature, then you're the first. (and congrats!)

SO, what tipped you off to the potential existence of a hidden secret? Anything? Nothing? Was Adventure the only game you had and you were trying every zany thing under the sun with NO expectations of hidden secrets? Did you find the dot by accident while trying to get the bridge stuck in the catacombs? Did you find the dot AND the signature all in the same game? In the same day? Or did several days/weeks/months go by before you put the dot together with the correct wall?

Spin your yarns here! Let's hear 'em!