Must be typos in the IOMFHS pub for Malew
I rechecked the MI and it has Richard 4 Jul 1879 age 55
If he was born in 1804 then of course he must have died in 1859
I don't see him in the Malew burial register

Mary Ann Shimmin Sayle was age 82 per the MI when buried 17 Aug 1926
So something is wrong either with the age and/or both of the death dates 1926 would make her b 1844 and 1928 would make her b 1846
So when did she die and how old was she?

I couldn't find her in Malew burial register to clarify.