diff --git a/src/engine/Session.h b/src/engine/Session.h
index 97fedcffde..f5165d6afc 100644
--- a/src/engine/Session.h
+++ b/src/engine/Session.h
@@ -67,8 +67,8 @@ void       xaccSessionDestroy (Session *);
 /*
  * The xaccSessionBegin() method begins a new session.  It takes as an argument
  *    the sessionid.  The session id must be a string in the form of a URI/URL.
- *    In the current implementation, only one type of URI is supported, and that
- *    is the file URI: anything of the form 
+ *    In the current implementation, only one type of URI is supported, and
+ *    that is the file URI: anything of the form 
  *       "file:/home/somewhere/somedir/file.xac"
  *    The path part must be a valid path.  The file-part must be a valid
  *    xacc/gnucash-format file.  Paths may be relativ or absolute.  If the 
@@ -114,12 +114,13 @@ void       xaccSessionDestroy (Session *);
  * 
  * The xaccSessionSetGroup() method will set the topgroup to a new value.
  *
- * The xaccSessionSave() method will commit all changes that have been made to
- *    the top-level account group. In the current implementation, this is nothing
- *    more than a write to the file of the current AccountGroup of the session. 
- *    If the current AccountGroup is NULL, then the file will be deleted.
- *    This routine will never release the lock on the file under any
- *    circustances. 
+ * The xaccSessionSave() method will commit all changes that have been
+ *    made to the top-level account group. In the current
+ *    implementation, this is nothing more than a write to the file of
+ *    the current AccountGroup of the session.  If the current
+ *    AccountGroup is NULL, then the file will be deleted.  This
+ *    routine will never release the lock on the file under any
+ *    circustances.
  *
  * The xaccSessionEnd() method will release the session lock. It will *not*
  *    save the account group to a file.  Thus, this method acts as an "abort"
@@ -165,8 +166,7 @@ void       xaccSessionDestroy (Session *);
  *    }
  *    xaccSessionEnd (sess);
  *    xaccSessionDestroy (sess);
- *
- */
+ * */
 
 AccountGroup * xaccSessionBegin       (Session *, const char * sessionid);
 AccountGroup * xaccSessionBeginFile   (Session *, const char * filename);
diff --git a/src/engine/design.txt b/src/engine/design.txt
index e9653c675f..989d64fb6b 100644
--- a/src/engine/design.txt
+++ b/src/engine/design.txt
@@ -61,7 +61,7 @@ The security is used during split balancing to enable trading between
 accounts denominated in different currencies, or to, for example, move 
 stocks from one account to another.
 
-Accounts can be arranged in a heirarchical tree.  The nodes of the 
+Accounts can be arranged in a hierarchical tree.  The nodes of the 
 tree are called "Account Groups".  By accounting convention, the 
 value of an account is equal to the value of all of its splits plus
 the value of all of its sub-accounts.  Account Groups are implemented 
@@ -151,7 +151,7 @@ and the price goes inversely.
 
 Stock Options
 -------------
-Stock options are note currently supported.  To support them, the
+Stock options are not currently supported.  To support them, the
 following needs to be added:
 
 A stock option is an option to purchase stock at a specified price.