Dangerous undertaking - more difficult to invent an original plot - that want to give a sequel to "The Yellow Mark" - album that remains for many the masterpiece of Edgar P. Jacobs. And bet quite far from over, despite some positive points. While many expected jacobsismes await you; for themes diabolical machination, mad scientists, raids on underground; and rhetorically abundant recitatives, many fragmented strips (about 35% of all strips), vertical symmetry pages (1/3 boards). But the comparison - inevitable - with the original lead to a serious subject: the plot abundant, incredible and inconsistent final, which resolves, so to speak, by using an apparently extraterrestrial entity, "deus ex machina" convenient and alien to the universe of Jacobs, who remained rational. One understands also not much to exaggerated wave properties of Septimus nor its relations with the more familiar Mega wave. If the plot is less "clear line" that of Jacobs, drawing, it, is more so, due to a lighter ink. Note some hideous cases in the last pages, the ultimate image Olrik (We remember that it was Jacobs himself who asked for Olrik, it's not nice to disfigure his livelihood.) And indeed quality weakens the pages. Color is realistic, but less dramatic than that of Jacobs, essentially theatrical. Note that the Blake and Mortimer participations in the plot are balanced, however, the star being held by Olrik to returning - innovation - coverage (very successful) album. It may be noted in passing amount of references to the adventures of Blake and Mortimer, besides "The Yellow Mark" - including "Swordfish" page 30 or "Atlantis" page 42. And we shall go through the pages the name - unexpected - Virginia Woolf and the image of Uncle Paul W. Churchill, flanked as it should be page 59. Anthony Eden was even perceive Tintin page 9 (cover of "Moon" on page 3, box 8) - and Francis Albany, inevitable in the London of 50 'on page 22. We still think of Floc'h page 55 for the curveball - a nice idea in itself; at the end of "2001" page 65, etc ... All this intertextuality is entertaining, but diverts some interest in the narrative, and prevents the reader from vibrating as spontaneously "L'Onde Septimus" he the fact to "The Yellow Mark". The failure to match Jacobs is still a tribute to his genius.