It is possible that she isn't one of the siblings. More research needed
Birth
Father Robert Pike, Male, Wife Elizabeth, Mother Elizabeth
Daughter Ann Pike, Female
Event 18 May 1844, St Lawrence, Burin, Newfoundland, Canada
Sources
"Newfoundland Vital Statistics, 1753-1893," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QK9Y-3QHV : 8 May 2015), GS Film 2133921, Digital Folder 4554303, Image 150, Robert Pike in entry for Ann Pike, 18 May 1844; citing Birth, St Lawrence, Burin, Newfoundland, Canada, Provincial Archives, St. John's. Pike-2301 04:08, 15 October 2016 (EDT)
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