diff --git a/build/build-usual-image b/build/build-usual-image
index 8af1c43..10851f2 100755
--- a/build/build-usual-image
+++ b/build/build-usual-image
@@ -13,7 +13,8 @@ USER=${USER-`logname 2>/dev/null || echo '*GOK*'`}
 ,load $srcdir/scheme/env/init-defpackage.scm
 ((*structure-ref filenames 'set-translation!)
  "=scheme48/" "$srcdir/scheme/")
-,load =scheme48/more-interfaces.scm =scheme48/link-packages.scm
+,load =scheme48/more-interfaces.scm =scheme48/sort/interfaces.scm
+,load =scheme48/link-packages.scm
 ,load =scheme48/more-packages.scm
 (ensure-loaded command-processor)
 (ensure-loaded usual-commands)
diff --git a/scheme/more-interfaces.scm b/scheme/more-interfaces.scm
index ff2981b..14b1dd9 100644
--- a/scheme/more-interfaces.scm
+++ b/scheme/more-interfaces.scm
@@ -648,23 +648,3 @@
    option-optional-arg?
    option-processor
    args-fold))
-
-(define-interface srfi-42-interface
-  (export ((do-ec
-	    list-ec append-ec
-	    string-ec string-append-ec
-	    vector-ec vector-of-length-ec
-	    sum-ec product-ec
-	    min-ec max-ec
-	    any?-ec every?-ec
-	    first-ec last-ec
-	    fold-ec fold3-ec) :syntax)
-	  ((:
-	    :list :string :vector
-	    :integers
-	    :range :real-range :char-range
-	    :port
-	    :dispatched) :syntax)
-	  ((:do :let :parallel :while :until) :syntax)
-	  :-dispatch-ref :-dispatch-set! make-initial-:-dispatch 
-	  (:generator-proc :syntax)))
diff --git a/scheme/more-packages.scm b/scheme/more-packages.scm
index cf8022d..4adc396 100644
--- a/scheme/more-packages.scm
+++ b/scheme/more-packages.scm
@@ -415,6 +415,7 @@
   (files (big placeholder))
   (optimize auto-integrate))
 
+
 ;----------------
 ; Big Scheme
 
@@ -423,10 +424,6 @@
 	signals)		;call-error
   (files (big random)))
 
-(define-structure sort (export sort-list sort-list!)
-  (open scheme-level-2)
-  (files (big sort)))
-
 (define-structure pp (export p pretty-print define-indentation)
   (open scheme-level-2
         tables
@@ -495,6 +492,88 @@
 	threads thread-cells fluids)
   (files (big thread-fluid)))
 
+;;; Package defs for the Scheme Underground sorting package,
+
+;;; The general sort package:
+
+(define-structure sorting sorting-interface
+  (open scheme
+	list-merge-sort
+	vector-heap-sort
+	vector-merge-sort
+	sorted
+	delete-neighbor-duplicates)
+  (files (sort sort))
+  (optimize auto-integrate))
+
+(define-structure sorted sorted-interface
+  (open scheme
+	vector-utils)
+  (files (sort sortp))
+  (optimize auto-integrate))
+
+(define-structure delete-neighbor-duplicates delete-neighbor-duplicates-interface
+  (open scheme
+	receiving
+	formats
+	vector-utils)
+  (files (sort delndups))
+  (optimize auto-integrate))
+
+(define-structure binary-searches binary-searches-interface
+  (open scheme
+	vector-utils)
+  (files (sort vbinsearch)))
+
+(define-structure list-merge-sort list-merge-sort-interface
+  (open scheme
+	receiving
+	(subset signals (error)))
+  (files (sort lmsort))
+  (optimize auto-integrate))
+
+(define-structure vector-merge-sort vector-merge-sort-interface
+  (open scheme
+	receiving
+	vector-utils
+	vector-insertion-sort-internal)
+  (files (sort vmsort))
+  (optimize auto-integrate))
+
+(define-structure vector-heap-sort vector-heap-sort-interface
+  (open scheme
+	receiving
+	vector-utils)
+  (files (sort vhsort))
+  (optimize auto-integrate))
+
+(define-structures ((vector-insertion-sort vector-insertion-sort-interface)
+		    (vector-insertion-sort-internal
+		     vector-insertion-sort-internal-interface))
+  (open scheme
+	vector-utils)
+  (files (sort visort))
+  (optimize auto-integrate))
+
+(define-structure vector-utils (export vector-copy
+				       vector-portion-copy
+				       vector-portion-copy!
+				       vector-start+end
+				       vectors-start+end-2)
+  (open scheme)
+  (files (sort vector-util)))
+
+;;; end Package defs for the Scheme Underground sorting package,
+
+(define-structure sort (export sort-list sort-list!)
+  (open scheme-level-2
+	sorting)
+  (begin
+    (define (sort-list l obj-<)
+      (list-sort obj-< l))
+    (define (sort-list! l obj-<)
+      (list-sort! obj-< l))))
+
 (define-structure big-util big-util-interface
   (open scheme-level-2
 	formats
@@ -942,7 +1021,17 @@
 	    search-trees
 	    sicp
 	    sockets
+
 	    sort
+	    delete-neighbor-duplicates
+	    binary-searches
+	    sorted
+	    list-merge-sort
+	    vector-merge-sort
+	    vector-heap-sort
+	    vector-insertion-sort
+	    sorting
+
 	    strong
 	    thread-fluids
 	    traverse