in neutral

in neutral

with the shift lever of a vehicle in the position where the motor is running but is not powering the wheels or other moving parts. The car rolled down the hill because I'd left it in neutral and did not put on the brake. If you are moving and in neutral, you do not have control of your vehicle.
References in classic literature ?
Whilst all the landscape was in neutral shade his companion's face, which was the focus of his eyes, rising above the mist stratum, seemed to have a sort of phosphorescence upon it.