File list (Check if you may need any files):
chapter26
.........\X
.........\.\C++
.........\.\...\Button.cpp
.........\.\...\Button.hxx
.........\.\...\Component.cpp
.........\.\...\Component.hxx
.........\.\...\Label.cpp
.........\.\...\Label.hxx
.........\.\...\Makefile
.........\.\...\PaneWindow.cpp
.........\.\...\PaneWindow.hxx
.........\.\...\Text.cpp
.........\.\...\Text.hxx
.........\.\...\test_it.cpp
.........\.\LIST_C++
.........\.\........\Makefile
.........\.\........\athena.cpp
.........\.\........\motif.cpp
.........\.\URLWIDGET
.........\.\.........\Makefile
.........\.\.........\TEMPLATES
.........\.\.........\.........\Template.c
.........\.\.........\.........\Template.h
.........\.\.........\.........\TemplateP.h
.........\.\.........\URL.c
.........\.\.........\URL.h
.........\.\.........\URLP.h
.........\.\.........\fetch_url.c
.........\.\.........\test.c
.........\.\athena
.........\.\......\#Makefile#
.........\.\......\Makefile
.........\.\......\button.c
.........\.\......\label.c
.........\.\......\list.c
.........\.\......\menu.c
.........\.\......\text.c
.........\.\motif
.........\.\.....\#Makefile#
.........\.\.....\Makefile
.........\.\.....\label.c
.........\.\.....\list.c
.........\.\.....\text.c