Just found them today in 1850 in Hanover Twp with 4 month old Franklin. This family removed to Stephenson Co, IL and subsequently to Barclay, Black Hawk Co, IA. I am hoping to find a marriage in Lehigh Co, abt 1849. The only other reference to Lehigh Co is Frank (lin)'s obituary in 1910 stating he was born in Lehigh Co, 1 Mar 1850. Parents of David and Mary are unknown. Thanks in advance.