India, April 21 -- Sometimes the accompaniment outshines the main course. Such is the case with the tomb of Ghiyasuddin Tughlaq. The emperor's tomb is interesting, but the secondary structure appended to his majesty's monument is more interesting. That said, the red sandstone tomb built 700 years ago on the southern edge of present-day South Delhi is imposing. It radiates power and awe, qualities typical of tombs belonging to Dilli's long-gone sultans. This one, after all, was built for a dynasty's founder. The tomb is so famous that it shows up even in the comic book Tintin in Tibet! To tell the truth, Ghiyasuddin's tomb appears more enigmatic when viewed from the hilltop ramparts of neighbouring Tughlaqabad Fort, which was built by Ghiyas...