Burke was hanged on the morning of 28 January 1829 in front of a crowd possibly as large as 25,000;[127][lower-alpha 18] views from windows in the tenements overlooking the scaffold were hired at prices ranging from 5 to 20 shillings.[129] On 1 February his corpse was publicly dissected by Professor Monro in the anatomy theatre of the university's Old College.[130] Police had to be called when large numbers of students gathered demanding access to the lecture for which a limited number of tickets had been issued. A minor riot ensued; calm was restored only after one of the university professors negotiated with the crowd that they would be allowed to pass through the theatre in batches of fifty, after the dissection. During the procedure, which lasted for two hours, Monro dipped his quill pen into Burke's blood and wrote "This is written with the blood of Wm Burke, who was hanged at Edinburgh.