We can see the entry from Alumni Cantabrigienses in several places, this is a good one to do ithttps://archive.org/stream/p1alumnicant ... 2/mode/2up
It's also repeated with his details on the Clergy Database (under "Comments")
I don't know the exact sources used, there is also
Admissions to the College of St. John the Evangelist in the University of Cambridge part 3 (published 1903)https://archive.org/stream/admissionsto ... /mode/2up/
Here there is some sort of transposition of names - Marmaduke Mower and Edmund Ward, which is commented on in the appendixhttps://archive.org/stream/admissionsto ... /mode/2up/
We can see the Norwich Consistory Court will of Marmaduke Ward here (need to be logged in)https://www.familysearch.org/ark:/61903 ... cat=410095
There must be various articles about tracing clergy online, or in book form, here is Anthony Camp (on FamilySearch Wiki)https://www.familysearch.org/wiki/en/Cl ... of_England
Mentions the possibility of there being a baptismal certificate among the ordination papers.
The Norfolk Chronicle of 7 April 1906 has, in it's Norfolk + Norwich Notes and Queries, a piece about the Ward family and claims that Marmaduke was of the family of Ward of Beauchief Abbey!