Kathy Tilghman began researching Slaves to Freedom while writing her book, A Vision of Freedom: African-Americans and the United States Capitol. She became fascinated with stories ...ver maisKathy Tilghman began researching Slaves to Freedom while writing her book, A Vision of Freedom: African-Americans and the United States Capitol. She became fascinated with stories of survival on the Underground Railroad and also with tales of Irish immigration to the United States during the 1850s. She lives in Parkville, Maryland, and is working on the sequel to Slaves to Freedom.ver menos