Webster's Revised Unabridged Dictionary · 1913

Endlong

Endlong (?; 115) , adverb and preposition

[Compare Along.]

Lengthwise; along. [Archaic]
The doors were all of adamants eterne, I-clenched overthwart and endelong With iron tough. — Chaucer
He pricketh endelong the large space. — Chaucer
To thrust the raft endlong across the moat. — Sir W. Scott