I felt it quiver beneath me; felt on the instant, the magnetic grip drop from me, angle downward and leave me free.

Shakily I arose from aching knees, and saw Ventnor flash down and run, rifle in hand, toward his sister.
Drake bent for his gun.

I moved unsteadily toward the side of the clustered cubes.

There came a curious pushing motion driving me to the edge.

Sliding over upon me came Drake and the pony-- The cube tilted, gently, playfully--and with the slightest of jars the three of us stood beside it on the floor, we two men gaping at it in renewed wonder, and the little beast stretching its legs, lifting its feet and whinnying with relief.
Then abruptly the four blocks that had been our steed broke from each other; that which had been the woman's glided to them.
The four clicked into place behind it and darted from sight.
"Ruth!" Ventnor's voice was vibrant with his fear.