Not sure about some of the 'honorific' stuff, but I think it basically says ...
In this tomb lies Francis Markham
from a noble family in the county of Lincoln
educated in a most illustrious academic college(?)
devoted his life to the glory of God and well-being of man
in this church and in nearby Berwick.
Died in his 45th year on 30 June 1668.
Alice
daughter of John Whorwood of Mansfield in the county of Nottingham, Gentleman,
unhappy widow of the deceased
had this monument built as a memorial to her most devoted husband ...
On 20 October 1679, aged 55,
after a life of good deeds
she willingly joined her husband in the marble tomb
Hopefully someone else will come along and improve it.