FindMyPast has the page image for John Whitaker - Rusholme Cemetery -
Grave No: 4218 - Burial date = 28 February 1828, John Whitaker, last residence = Manchester, aged 51, cause of death = Apoplexy.
On the same page is an entry for the same grave number - 2 March 1828 - George Robinson, aged 4.
I have not looked at other pages in the register to see if the grave might have been a common grave.