a. Hollywood Cemetary (Harrington, Kent, Delaware, USA). Grave markers.
b. 1850 census of USA. Delaware. Kent. Digital images. familysearch.org.
c. Delaware, USA. DEATH Certificates.
d. 1900 census of USA. Delaware. Kent. Digital images. FamilySearch.org.
e. Lakeside Cemetary (Dover, Kent, Delaware, USA). Grave markers.
f. Delaware USA. BIRTH Certificates.
1. Title Hollywood Cemetary (Harrington, Kent, Delaware, USA), Grave Markersa; Page Sipple, William L (1850-1921); Text http://image2.findagrave.com/photos/2011/136/35960687_130562880123.jpg; [Source Record]
2. Title 1850 Census of USA, Delaware, Kent; Online Imagesb; Page Milford and Mispillion Hundred - Page 101; Text https://familysearch.org/ark:/61903/3:1:S3HT-6XQC-JYJ; [Source Record]
3. Title Delaware, USA, DEATH Certificatesc; Source Repository Citation, Repository FamilySearch.org [Repository]; Page Sipple, William Luff (1850-1921); Text https://familysearch.org/ark:/61903/3:1:S3HT-D4M3-CNB; [Source Record]
4. Title 1900 Census of USA, Delaware, Kent; Online Imagesd; Page Mispillion Hundred - Page 11a; Text https://familysearch.org/ark:/61903/3:1:S3HY-69YN-37; [Source Record]
5. Title Lakeside Cemetary (Dover, Kent, Delaware, USA), Grave Markerse; Page Sipple, Mary Elizabeth (1886-1966); Text http://image2.findagrave.com/photos/2015/83/7731207_1427310892.jpg; [Source Record]
6. Title Delaware USA, BIRTH Certificatesf; Source Repository Citation, Repository FamilySearch.org [Repository]; Page Sipple, Mary Elizabeth (1886-1966); Text https://familysearch.org/ark:/61903/3:1:S3HY-X4S3-HLN; [Source Record]