ISAIAH HARRISON, the immigrant ancestor, arrived in America and settled at Oyster Bay, Long Island, N. Y. in about 1687, where his name first appears on the Town Records on January 2nd of that year, coming from Dublin, Ireland on the boat "Spotted Calf. " He is thought to have been born in the city of Chester in England, and as refugee, sailed from that port or the more modern, nearby Liverpool, which was rapidly supplanting Chester as a point of departure, due to the silting up of the River Dee. Many other Protestants sailed from this point on ''The Pied Cow" about this same time.