Hello Beverley,
No such grave as B 3004.
RD 1411 no burials here for Sinnott.
1A 67
Stephen Siinnott d 121 Latham St age 40 int 16/12/1901
Mary Sinnott Deedholder 63 Evelyn St Age 76 int 13/4/1926
Anne Balger 1 Woodland View L23 age 72, int 9/10/1980
SD 661. Mary Sinnott deedholder 13/4/1926
Michael Donnelly 46 Virgil St age 4 months int 22/3/1929
Nicholas Sinnott 107 Rice Lane L9 age 40 25/5/1937
As a beginner may I suggest that you post general enquiries on your family on the main forum as readers are very willing to share their knowledge there. Please use this thread for lookups only, it can get a little confusing with the extra detail. Family Trees on Ancestry.com if researched correctly should show complete source information, perhaps you can contact the owners of these trees as I cannot solve these problems for you. sorry.
Marienne