This meeting could have been a dropbox delivery on the third bench on the left by the Märchenbrunnen in the Volkspark Friedrichschain in East-Berlin.
This meeting could have been a numbers station transmission.
This meeting could've been a steganographed message on a Gideon's Bible left at room 401 of the Savoy Hotel.
This meeting could have been getting a beer when I asked for a Viennese coffee at the café on Prague's Central Station.
This meeting could have been an upside-down book in the Thriller section at the Barnes&Noble on the 5th Avenue next to the exfiltration point.
This meeting could have been a "silent" track in a bootleg copy of 'the Lion King' playable only on a regionally restricted DVD.
This meeting could have been a newspaper forgotten by the cultural attaché of the Swedish embassy on the fourth bench from the north by the duck's pond in Hyde Park.
This meeting could have been a classified ad in the Times on the third Thursday of the month referring a Mister Chesterton.
This meeting could've been a cigarette paper written with lemon juice, rolled into itself and tied to a pigeon's leg.
This meeting could have been a bloodied straight razor with ivory scales left open in the sink of a Route 66 motel by Flagstaff, and "It's coming." written in blood on the mirrror above it.
This meeting could have been the open entrails of a chicken on the altar to Jupiter Maior at the forum.
This meeting could have been an artillery barrage at 7:00 o'clock followed by Stosstruppen ten minutes later.
This meeting could have been drawing the ace of spades of a just opened deck of cards ten times in a row while the lightbulbs titillate.
This meeting could have been a tooth slowly birthing in your right calf, protruding painlessly, but slowly and surely, showing its white, shiny crown, attracting obsessively your gaze, resurging even though you pull it once, and again, and again…
@Illuminatus This meeting could have been a time travel to kill the grandparents of all those attending.