*first-hand*

a. Obtained directly from the first or original source; hence, without the intervention of an agent; -- of information; as, a firsthand report; firsthand information; firsthand knowledge.
Syn. -- direct, original. [ 1913 Webster ]

One sphere there is . . . where the apprehension of him is first-hand and direct; and that is the sphere of our own mind. J. Martineau. [ 1913 Webster ]