He left some manuscripts behind, which were printed in London a few years after his death, in a work called Memoirs of the Society instituted for encouraging Discoveries in the Interior of Africa. A work, entitled Voyages de M M. Ledyard et Lucas, en Afrique, suivis d'extraits d'autres voyages, was also printed at Paris in 1804. Mr. Ledyard, in his journal, evinces great powers of observation, and a sound judgment and understanding. Some idea of his sufferings may be formed, in reading the following extract: I have known,' he writes, both hunger and nakedness to the utmost extremity of human suffering. I have known what it is to have food given me as charity to a madman; and I have at times been obliged to shelter myself under the miseries of that character, to avoid a heavier calamity. My distresses have been greater than I have ever owned, or ever will own, to any man. Such evils are terrible to bear but they never yet had power to turn me from my purpose. If I live, I will faithfully perform, in its utmost extent, my engagements to the Society; and if I perish in the attempt, my honor will still be safe, for death cancels all bonds.