Dear valued agent of our clandestine league:
Rumours have been brought to my attention of a curious and disturbing nature. There is talk of a powerful obelisk of unknown origin...that has mysteriously appeared in the plains of Tyrannia. Obviously, I assume this to be nonsense. After all, for this to have slipped past our watchful gaze would be absurd, would it not? Nothing escapes the Sway. Nothing.
And yet...Our source was so eloquent in his description of the obelisk. This embarrassment must be dealt with. So you are hereby cordially invited to attend a meeting, where we shall discuss the matter at length.
However, I expect that should these rumours prove true, you will each have a satisfying explanation as to how this failure is not your own.
Such a valuable find must not be left to the masses. If it indeed exists, then it must be brought within our grasp.
I will expect to see you at the enclosed location in two day's time. Attendance is mandatory.

P.S. - Don't be late.