diff --git a/version_54/source/Farrar_orig_test.cc b/version_54/source/unused/Farrar_orig_test.cc
similarity index 100%
rename from version_54/source/Farrar_orig_test.cc
rename to version_54/source/unused/Farrar_orig_test.cc
diff --git a/version_54/source/changeGasMaps.cc b/version_54/source/unused/changeGasMaps.cc
similarity index 100%
rename from version_54/source/changeGasMaps.cc
rename to version_54/source/unused/changeGasMaps.cc
diff --git a/version_54/source/ppfrag.cc b/version_54/source/unused/ppfrag.cc
similarity index 100%
rename from version_54/source/ppfrag.cc
rename to version_54/source/unused/ppfrag.cc
diff --git a/version_54/source/stokes.cc b/version_54/source/unused/stokes.cc
similarity index 100%
rename from version_54/source/stokes.cc
rename to version_54/source/unused/stokes.cc