He moved it about, as though touching an invisible form.
An invisible form came into being from the darkness.
Anson, in his invisible form, runs out into the street and is killed by a truck.
Moving in a form invisible to almost everyone he passed.
His invisible form slid through the unlocked side of the car.
His main hope is that modern colonialism, in its visible and invisible forms, comes to an end.
The invisible form made no reply, for it could not speak.
A form - now invisible - was making its silent entrance into the house.
An invisible form stood outside the building; but it did not remain there long.
His form invisible against the wall outside the building, this being had become a specter of the night.