The book is available at Hathi Trust (I have not checked for other online sources).
Table of Contents
The Story of Beowulf
The Slaying of Grendel
Grendel's Mother
The Dragon
King Arthur and the Round Table
How Arthur Came to His Kingdom
Of Excalibur and the Round Table
The Adventures of Sir Balin
The Adventure of Sir Gareth
The Adventures of Sir Lancelot
Of Another Adventure of Sir Lancelot
The Adventure of the Holy Grail
How Sir Galahad Found the Holy Grail
The Treasure of the Nibelungs
Siegfried Comes to Worms
Of Siegfried and the Saxons
The Wooing of Brunhild
The Winning of Brunhild
How the Queens Fell Out
How Siegfried Was Betrayed and Slain
How Kriemhild Mourned for Siegfried
How King Etzel Courted the Queen Kriemhild
How Kriemhild Sent for Her Kindred
How the Rhinelanders Came to King Etzel
Of the Beginning of Strife
How Bloedelin and Many More Were Slain.
How the Hall Was Set on Fire
The End
