<div dir="ltr"><div class="gmail_default" style="font-family:georgia,serif;font-size:small">You could say it's interrupted, as foliation, but really it's continuous sheet numbering--in folio, e.g. the 1st to 4th sheets in 8s, in quarto the outer (1/2) and inner (3/4) sheets. Infrequent, but occasionally found in incunabula. Without the letters you have to know the sheets per gathering to get it right. (I think--I'm not actually folding paper at the moment, which can be dangerous.)</div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><font face="'courier new', monospace">RICHARD NOBLE :: RARE MATERIALS CATALOGUER :: JOHN HAY LIBRARY</font><div><font face="'courier new', monospace">BROWN UNIVERSITY :: PROVIDENCE, R.I. 02912 :: 401-863-1187</font></div><div><span style="font-family:'courier new',monospace"><</span><a href="mailto:RICHARD_NOBLE@BROWN.EDU" style="font-family:'courier new',monospace" target="_blank">Richard_Noble@Br</a><span style="font-family:'courier new',monospace"><a href="http://own.edu" target="_blank">own.edu</a></span><span style="font-family:'courier new',monospace">></span></div></div></div>
<br><div class="gmail_quote">On Thu, Jul 19, 2018 at 4:17 PM, Joseph Ross <span dir="ltr"><<a href="mailto:jross@nd.edu" target="_blank">jross@nd.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Colleagues,<div><br></div><div>In recent discussions of books that use signatures that number or letter the bifolia continuously from one quire to the next but have no quire signatures: i.e., 1,2,3,4 (4 leaves unsigned), 5,6,7,8 (4 leaves unsigned) or a,b,c,d,e (4 leaves unsigned) f,g,h,i (4 leaves unsigned .... to the end of the book. I remarked that this was a rarely used signature pattern from manuscript books. I have found my source for this statement: Albert Derolez, Codicologie des manuscrits en ecriture humanistique sur parchemin. Brepols, 1984, P. 48. Derolez identifies 6 types of leaf signatures (signatures de feuillets) that are being used in 15th century Italian manuscripts. The sixth type he calls "Signatures a foliatation interrompue: They have the form a1 a2 a3 a4 a5 ... b6 b7 b8 b9 or without the letters identifying the quire: 1 2 3 4 5 ... 6 7 8 9 10 etc. This exceptional type is found in 7 cases (0.6 % of the corpus) of which the oldest is no earlier than 1453. "</div><div><br></div><div>I am not sure where I found the terminology continuous bifolia numeration, but this text at least shows that manuscript scribes did occasionally use this kind of signature pattern.</div><div><br></div><div>Just to show I did not make this up!</div><div><br></div><div>Joe Ross</div><div>Rare Book Cataloger\</div><div>University of Notre Dame</div><div><br></div></div>
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