Steve,
There is website,Ballinaglera.com.
On it is a section Dolan Family History ----- Dolans in East Lothian & Ireland,Ballinaglera ,Co.Leitrim.(page 10)
A website is mentioned where the name can be researched either as a paid or free member.Some restrictions apply to the latter.
The name is not common in Ballinaglera.
In 1901 census there were only 2 families.
Patrick,age 68 & his family in Cornamucklagh South.
John, age 60 & family in Sranagarvanagh, in this family is a Charles,age 19.
Hopefully you will connect with others there. Maura