+%\chapterstyle{madsen} % one of chapter header style for memoir documentclass
+\makechapterstyle{morrow}{% requires graphicx package
+ \chapterstyle{default}%
+ \renewcommand*{\chapnamefont}{%
+ \normalfont\Large\scshape\raggedleft}%
+ \renewcommand*{\chapnumfont}{%
+ \normalfont\Large\bfseries\sffamily}%
+ \renewcommand*{\printchapternum}{%
+ \chapnumfont \resizebox{!}{3ex}{\thechapter}%
+ }%
+ \renewcommand*{\chaptitlefont}{%
+ \normalfont\Huge\bfseries\sffamily\raggedleft}%
+ \renewcommand*{\afterchapternum}{%
+ \par\hspace{1.5cm}\hrule\vskip\midchapskip}%
+}%
+
+\chapterstyle{morrow} % one of chapter header style for memoir documentclass