It is always better to include a link and a snip of the part you cannot read at normal magnification.
When the entry is looked at, with normal magnification the writing is much clearer and easier to decipher than some we have been asked to look at which look like a spider has dipped itself in ink and walked over the page!
We have found & attached a normal marriage certificate and it has no handwritten note or do you mean the piece at the left hand side of the entry?
Or have we got the correct entry?
29/11/1913 at Roman Catholic Church Larne by Randal MacC
r?udden (parish priest)
Robert Haveron, full age, widower, labourer, Main st Larne Patrick haveron Farmer
Mary Lee formerly Duff, full age, widow, servant, Main st Larne John Duff farmer
Witnesses:
Samuel Hefferon (This surname often has a 'a' instead of the 'o'?
Mary Anderson
This may be a daughter Elizabeth Jane Haveron
https://civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1919/01259/1522835.pdf