--- a/text/intro.tex	Wed Oct 27 00:08:11 2010 -0700
+++ b/text/intro.tex	Fri Oct 29 11:37:00 2010 +0900
@@ -277,7 +277,7 @@
 \end{equation*}
 \end{property}
 
-Properties \ref{property:functoriality} will be immediate from the definition given in
+Property \ref{property:functoriality} will be immediate from the definition given in
 \S \ref{sec:blob-definition}, and we'll recall it at the appropriate point there.
 Properties \ref{property:disjoint-union}, \ref{property:gluing-map} and 
 \ref{property:contractibility} are established in \S \ref{sec:basic-properties}.