Fe XXV EW map overlaid by the Subaru-COMICS mid-IR [Ne II] contours. The colour bar shows the Fe XXV EW in keV. The white arrows indicates the three Fe XXV-enhanced regions I, II, and III, which appear to fill the chimneys and to be connected to the mid-IR knot ‘E1’ (Achtermann & Lacy 1995). The orange arrow indicates the chimney with an expanding bubble identified around the SNR 41.95+57.5 by Wills et al. (1999). The two region-segments dX34 and dX35, discussed in the text, are also indicated.