At the moment, he had managed to keep the fact that there was even the slightest thing wrong with him a secret.
The guard decided to keep the fact he had passed out a secret.
I cannot say what squeamishness still made me keep the fact of my success from them.
I have to keep the fact that I'm still alive a secret.
Important enough to keep your identity and the fact you have a bodyguard secret.
We can keep the fact of having done so quite secret.
"You're usually very careful to keep the fact firmly in front of everybody."
Just keep the fact firmly in mind that I'm not going to let you get hurt.
In those days a member kept the fact to himself.
Why was it so important to keep the fact of the murders secret?