In Robbins v. Workmen's Compensation Appeal Board (Mason-Dixon Line, Inc.), 91 Pa. Commw. 269, 496 A.2d 1349 (Pa. Cmwlth. 1985), the claimant, also a truck driver, had 15 of his 37 loads, or 40%, originate in Morrisville, Pennsylvania or Philadelphia, Pennsylvania. He dispatched one load each in Lancaster and Beaver Falls, Pennsylvania. Further, on nine assignments that did not originate in Pennsylvania, the claimant spent time driving through Pennsylvania. The Court found that these facts supported a finding that the claimant spent a substantial part of his working time in the service of his employer in Pennsylvania.