Original: Ollard , 1984 , ch .16 The detailed private diary he kept during 1660 -- 1669 was first published in the nineteenth century , and is one of the most important primary sources for the English Restoration period .
Simplified: The detailed private diary that he kept during 1660 -- 1669 was first published in the nineteenth century , and is one of the most important primary sources for the English Restoration period .