Refer to Ancestry.com. The search will lead you to the Vreeland genealogy project which names Daniel P, his wife and their thirteen children. Some biographical information is also found in the History of Morris County New Jersey, Vol. II, Lewis Publishing Co 1914 which is posted at rootsweb.com. See the page for horace Zeliff, son of Daniel P. Zeliff and Charled H. Hoagland, who married the granddaughter of Daniel P., Edna E Zeliff on Feb. 28, 1889.