diff --git a/Changelog.md b/Changelog.md
index 5cecf057412..cd09f045d60 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -14,7 +14,14 @@
       * `-fno-shared-code` (default)
       * `-fshared-code` (legacy)
     (Helps mitigate the effect of the IC's new cost model, that increases
-     the cost of function calls).
+	the cost of function calls).
+
+* motoko-base
+
+  * Added `Principal.toLedgerAccount` (#582).
+
+  * Added `Text.toLowercase` and `Text.toUppercase` (#590).
+
 
 ## 0.10.0 (2023-09-11)
 
@@ -31,6 +38,8 @@
 
   * Exposed conversions between adjacent fixed-width types (dfinity/motoko-base⁠#585).
 
+  * Added library `Region.mo` offering isolated regions of IC stable memory (#580).
+
 ## 0.9.8 (2023-08-11)
 
 * motoko (`moc`)
diff --git a/doc/md/base/Principal.md b/doc/md/base/Principal.md
index 43dc4dff40c..2a522beeec0 100644
--- a/doc/md/base/Principal.md
+++ b/doc/md/base/Principal.md
@@ -47,6 +47,20 @@ actor MyCanister {
 }
 ```
 
+## Function `toLedgerAccount`
+``` motoko no-repl
+func toLedgerAccount(principal : Principal, subAccount : ?Blob) : Blob
+```
+
+Compute the Ledger account identifier of a principal. Optionally specify a sub-account.
+
+Example:
+```motoko include=import
+let principal = Principal.fromText("un4fu-tqaaa-aaaab-qadjq-cai");
+let subAccount : Blob = "\4A\8D\3F\2B\6E\01\C8\7D\9E\03\B4\56\7C\F8\9A\01\D2\34\56\78\9A\BC\DE\F0\12\34\56\78\9A\BC\DE\F0";
+let account = Principal.toLedgerAccount(principal, ?subAccount); // => \8C\5C\20\C6\15\3F\7F\51\E2\0D\0F\0F\B5\08\51\5B\47\65\63\A9\62\B4\A9\91\5F\4F\02\70\8A\ED\4F\82
+```
+
 ## Function `toBlob`
 ``` motoko no-repl
 func toBlob(p : Principal) : Blob