Theodore Roosevelt actually said...

"Our proposition is not to confer a right of action upon the Government employee, but to secure him suitable provision against injuries received in the course of his employment."

"Warning is hereby expressly given to all unauthorized persons not to appropriate, excavate, injure or destroy any of the prehistoric ruins or remains thereof declared to be a National Monument, or to ..."

"Provided, That this withdrawal shall not affect any existing valid rights of any party."

"In Witness Whereof,I have hereunto set my hand and caused the seal of the United States to be affixed."