From Greek words ‘old’ and ‘writing’; it is the rigorous discipline of deciphering ancient handwriting on codices and papyri. The styles of writing determine the dates of MSS. So palaeography is an essential stage in textual criticism of the NT.
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"palaeography." In A Dictionary of the Bible. Ed. W. R. F. Browning. Oxford Biblical Studies Online. Feb 24, 2017. <http://www.oxfordbiblicalcstudies.com/article/opr/t94/e1398>.
"palaeography." In A Dictionary of the Bible. , edited by W. R. F. Browning. Oxford Biblical Studies Online, http://www.oxfordbiblicalcstudies.com/article/opr/t94/e1398 (accessed Feb 24, 2017).