"I will, however, inform Earth that I have sent an asteroid more than forty miles long on a collision course-an asteroid they can't see and can't stop!

The foremost one is the usual collision bulkhead.

Even Mr. Naylor, hardened by five-and-thirty years' experience of what sailors will blandly swear to in collision cases, was struck with the open candor of his bearing.

Collision orbit, by Will Stewart, pseud.

Let the Government send no ships, men or supplies to the forts, in order that we may without danger or collision build batteries to take them.