Still, there is a certain pleasure in planting seeds of unknown identity, just to see what might turn up.

The last living link to the Boss' unknown identity was gone.

The 191st Infantry Division was attacked last night by heavy forces of unknown identity.

To The Shadow, it was a proclamation of an unknown identity.

The movie opens with the assassination of a man of unknown identity.

Mother Featherlegs was buried quietly on the spot, her identity still unknown.

Each works for a mysterious "Voice", a rich man of unknown identity.

Inside the hospital, the Quinns - their identities still unknown to the public - were celebrities.

She might never measure up to that unknown identity.

I added a new plant of unknown identity when a neighbor gave me a little clump.