There was a curious grating sound and the panel slid back, revealing the welcome sight of the strong box reposing in the recess.
Unwittingly Grace had touched the secret spring.

Both girls cried out in triumph.

Then, hurrying to the window, they climbed out, ready to receive the box.

John set it on the window-sill, and, though very heavy, Grace and Eleanor combined forces and lowered it to the ground.

Leaping over the sill, the coachman picked it up, and the three set off at full speed down the path.
The ride back to "Heartsease" was a memorable one to at least two of the occupants of the machine.