Yes there are others.
They come in at 52d20' up to 52d50'...nothing over 53d.
The problem with all of Petrie's measures is that he only measured the base casing...not the actual side angle.
Easy to determine the height using trig, but the actual angle of the side at the apex is not that as quoted by Petrie.
Compare the peak from any photograph to the peak formed from Petrie's measures...big difference.
I sheds a complete new light on the subject.
Life is not short....it is eternal.
It is we who have the short pleasure passing through it !!