Re: The tunnel towards Roza-e-Rasool.
No the story is not from 1800s, its from the time of Crusades and as pointed out by Abba Jaan above, Noor Uddin Zengi was the ruler at the time and he caught the culprits...Salah uddin Ayubi was one of Noor Uddin's Generals...
It is said that when Noor Uddin went down the tunnel...the culprit had actually breached the roza mubarak of Syedna Umar...it was as if he was buried a few hours ago...