VanSickle Family Genealogy Forum
See my message from last year (?) about getting ahold of the book, The History of the Van Sickle family in the United States, by John Waddell Van Sickle. Peter's line migrated to Ohio after he received a land grant because of his Revolutionary War service (you're DAR qualified if you can prove your line to him, fyi). John Waddell lived in Springfield, Ohio and was decended from Peter, too.
Most of the lines are fairly well documented considering the time frame (1880) that JW was researching in. That said if you can prove your line from yourself back to somebody who lived before 1880 you should have no trouble tracing your line to Cornelius... Now, getting real proofs--ie birth, death and marriage "documents" can be another story.
Georgiana Van Syckle