Text ( visual ) : unmediated On the shortness of life / Seneca ; translated by C.D.N. Costa. -- London : Penguin , 2004. -- 105 p. ; 18 cm. -- (Penguin books ; . Great ideas ; 1). -- "First published in Dialogues and letters in Penguin classics 1997. This selection first published in Penguin Books 2004"--T.p. verso. -- ISBN 014101881X ; (BA69402810) ; https://ci.nii.ac.jp/ncid/BA69402810 Author Heading(s): Seneca, Lucius Annaeus, ca. 4 B.C.-65 A.D. ; Costa, Charles Desmond Nuttall