There was a cat, of doubtful origin, which had made itself the lab mascot-moved in and taken possession.
However, this story is not considered to be reliable and is rejected by most historians due to a its doubtful origin.
Our information continued for a while, but it was of doubtful origin.
"I would have noticed any doubtful origin of a work," he insisted.
He said the fire service was treating the blaze as 'of doubtful origin.'
However, a Harwich police spokesman said yesterday no definite cause had been established and the fire was still being treated as of doubtful origin.
The other two skins are of doubtful origin.
Let's just call it doubtful origin for now, okay?
I dried my hands on a kitchen towel of doubtful origin.
In this realm, there is no controversy between Christians, only the certainty of doubtful origins.