“Look out, Merriwell!”

Now Woodock tried to catch hold of the fellow, but Flynn struck at Frank with that bright thing, and Merriwell dropped to the floor, with a gasping exclamation.

“He’s stabbed!” shouted Dustan, horrified.

Clang!

The knife fell from Flynn’s hand to the floor. The ruffian stared down at Frank a moment, and then he whirled toward the door.

“Stop him!”

Howard Dustan shouted the words.

“Don’t try it!” grated Flynn.

One of the spectators did try it, however.

Out shot Flynn’s fist. Smack!—it struck the fellow fairly in the mouth, knocking him down.