Interesting stuff. Not my discovery but Taz Taylor, a guitarist from near me who lives in San Diego. He just posted this in his Facebook page.

"We all know that in addition to being a brilliant drummer, Neil Peart also wrote the lyrics to Rush songs and so therefore also likely gave them their titles...though he never sang those lyrics.
It occurred to me today that in the instrumental track "YYZ" even though there are no lyrics, the first few seconds of the song are Neil playing the letters "YYZ" in Morse Code.
Kinda cool really...he sets the song up by "singing" the title in such a unique way since it is an instrumental.
YYZ is the IATA designation for Toronto Airport and so would be the labels on Neil, Alex and Geddy's baggage when they finished a tour and hit that final flight home."

Check out The Taz Taylor Band

Cheers