This volume was published in 1860.
From the book's Preface:
It is believed that the following biographical sketch
of ABRAHAM LINCOLN will be found reliable. The
information upon which the narrative is based, has
been derived chiefly from the remembrance of MR.
LINCOLN'S old friends, and may, therefore, be con-
sidered authentic. It is hardly necessary to add,
that no one but the writer is responsible for his
manner of treating events and men.