Mary Sheridan Park in Lambertville is diminutive in size but rich in items of historic interest, from its 1840s vintage city jail, to its 1870 Civil War monument, to its often-overlooked Civil War naval cannon.

John Holcombe, father of Richard, was the first settler in the Lambertville area. A Quaker born in England and formerly of Abington, John purchased 350 acres in 1705 that included the northern half …