| http://www.w3.org/ns/prov#value | - In th[e] enforcement [of regulations as to what may be transported in the mails], a distinction is to be made between different kinds of mail matter,??between what is intended to be kept free from inspection, such as letters, and sealed packages subject to letter postage; and what is open to inspection, such as newspapers, magazines, pamphlets, and other printed matter, purposely left in a condit
|
