Complex sentence: William Dubh is buried on the island of Iona with his predecessors and the body of Murcha Breac is placed within the same tomb--the manuscript states that this was the greatest honour which could be bestowed upon his remains.
Split into simpler sentences: William Dubh is buried on the island of Iona with his predecessors, and the body of Murcha Breac is placed within the same tomb. The manuscript states that this was the greatest honour which could be bestowed upon his remains.