a. 1850 census of USA. Delaware. Kent. Digital images. familysearch.org.
b. Hollywood Cemetary (Harrington, Kent, Delaware, USA). Grave markers.
c. Delaware, USA. DEATH Certificates.
1. Title 1850 Census of USA, Delaware, Kent; Online Imagesa; Page Milford and Mispillion Hundred - Page 101; Text https://familysearch.org/ark:/61903/3:1:S3HT-6XQC-JYJ; [Source Record]
2. Title Hollywood Cemetary (Harrington, Kent, Delaware, USA), Grave Markersb; Page Sipple, William L (1850-1921); Text http://image2.findagrave.com/photos/2011/136/35960687_130562880123.jpg; [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]