I've decided to go through the Luzerne Co, PA Genweb with a fine-toothed comb and jot down anything and everything I think pertinent to my research on the Sims and related families who relocated to Lawrence Co, IL. I came across these items today and thought they might be of interest in particular to Belles family researchers because Lawrence Co pioneer Philip Belles married a woman named Keithline/Keichline.

From "Letters from the Pennsylvania Claimants"
page 347 -- Letter from P. Snyder -- Easton, Aug't 19, 1803 -- Thomas Lloyd, Esq'r. "Sir: We have delayed acknowledging your favour of the 14th Ult'o (Wherein you mention that it will be necessary to procure certified copies of the Returns of Survey of the Lands owned or claimed by your testator, M'r. Peter Kachlein, deceased), untill we had wrote to a friend at Lancaster to make searches in the Land Office, and Certify to us the facts how he shall have found them...P. Snyder

pages 362-364 -- Representation of David Moore -- Feb'y 17, 1803 -- "...Cash p'd the Receiver General, receipt dated 9, 21 June, 1773 for lands...Add the moiety of the Sums p'd the State on the Warr'ts of Kess and Kachlein, J. (James) Moore p'd 100 pounds for this moiety..."

Apparently the Keithline/Kachlein family was somehow involved in the land dispute between the Connecticut settlers and the Pennamites. I didn't find anything close to that surname in any of the online transcripts of the Susquehanna Company, so I would say that they were probably a local Pennsylvania family and not a Connecticut settler family.