diff --git a/docs/doc-geo.txt b/docs/doc-geo.txt
index bc6365d..e506f1f 100644
--- a/docs/doc-geo.txt
+++ b/docs/doc-geo.txt
@@ -44,13 +44,13 @@ Functions
                 The pointer of Header can be NULL and will be set to point to
                 a region in the buffer.
 
-                const char*, file data
+                const char*, the buffer containing the whole geometry package.
                 Can not be NULL.
 
     bool getmeshheader(struct MeshHeader**, 
                        unsigned int, 
                        const char * const);
-        Retrives the i-th MeshHeader in a buffer.
+        Retrieves the i-th MeshHeader in a buffer.
 
         input:
             Pointer of a pointer to MeshHeader.
@@ -72,7 +72,7 @@ Functions
     bool getbatch(struct Batch*, 
                   unsigned int offset, 
                   const char * const);
-        Retrives the i-th Batch in a buffer.
+        Retrieves the i-th Batch in a buffer.
 
         input:
             Pointer to a Batch.
@@ -94,7 +94,7 @@ Functions
                  unsigned int, 
                  const char*,
                  unsigned int);
-    Retrives the i-th Mesh in a buffer.
+    Retrieves the i-th Mesh in a buffer.
 
         input:
             Pointer to mesh.
diff --git a/docs/doc-tex.txt b/docs/doc-tex.txt
index c910535..516106b 100644
--- a/docs/doc-tex.txt
+++ b/docs/doc-tex.txt
@@ -31,6 +31,7 @@ Functions
             a region in the buffer.
 
             const char*, the buffer containing the whole texture pack file.
+            Can not be NULL.
 
     bool getbatchdesc(struct TextureBatchDescriptor**, 
                       unsigned int,