In 1878, when the emperor was incapacitated by the shot of an assassin, the prince acted for some months as regent.
During 1765 he seems to have been totally incapacitated for public business.
Though encouragement was given to the idea that he might return to the House of Commons, where he continued to retain his seat for Birmingham, he was quite incapacitated for any public work; and this invalid condition was protracted throughout 1907, 1908 and 1909.
He commanded in the battle of Fair Oaks (May 31, 1862), and was so severely wounded as to be incapacitated for several months.
The flamen Dialis was not allowed to leave the city for a single night, to ride or even touch a horse (a restriction which incapacitated him for the consulship), to swear an oath, to look at an army, to touch anything unclean, or to look upon people working.