I think Mary Jane Sparks (Drost) may be linked to the wrong generation of Peter Drost as her father. Based on birth dates, Mary Jane was born in 1855 and Peter Drost IV was born in 1871, and daughter Julia McIntosh was born in 1887. That would make Mary Jane 32 years old and Peter IV 16 years old at Julia's birth. I don't have information on Peter Drost IV's father, Peter Drost III, yet but is it possible Peter III is actually Mary Jane's father? Has anyone found evidence confirming which Peter is Mary Jane's father?