Jenckes was born in early November 1918 to Thomas B. Jenckes and the former Abigail W. Allen. He attended public schools and graduated from the Brown University. Studying law and being admitted to the state bar two years later, he proceeded to commence practice. | Jenckes was born in early November 1918 to Thomas B. Jenckes and the former Abigail W. Allen. He attended public schools and graduated from the Brown University. Studying law and being admitted to the state bar two years later, he proceeded to commence practice. |