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100   $a19860415d1641      uy             |
101 0 $aeng
135   $aurbn||||a|bb|
200 10$aMercvry, or, The secret and svvift messenger$b[electronic resource] $eshewing, how a man may with privacy and speed communicate his thoughts to a friend at any distance
210   $aLondon $cPrinted by I. Norton, for Iohn Maynard and Timothy Wilkins ...$d1641
215   $a[14], 180 p
300   $aCommendatory poems by Sir Francis Kynaston and others.
300   $aReproduction of original in Cambridge University Library.
330   $aeebo-0021
606   $aCryptography$vEarly works to 1800
615  0$aCryptography
700   $aWilkins$b John$f1614-1672.$0459499
701   $aKinnaston$b Francis$cSir,$f1587-1642.$01004022
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801  2$bm/c
801  2$bWaOLN
906   $aBOOK
912   $a996383534503316
996   $aMercvry, or, The secret and svvift messenger$92355394
997   $aUNISA