[Gigablah]

It turns out that most Touhou fansites have the reading of the title wrong. It should be Touhou Sangessei, not Sangetsusei. (see below for correction)

Source:
http://www.accessup.org/jmanga/7_Thr...t_history.html

Which gives us this shot from the comic itself:
http://picasaweb.google.co.jp/hokkai...33785612601474