diff --git a/src/Cheeper/Chapter9/DomainModel/EventStore.php b/src/Cheeper/Chapter9/DomainModel/EventStore.php
index 14a7be3..c5f98d4 100644
--- a/src/Cheeper/Chapter9/DomainModel/EventStore.php
+++ b/src/Cheeper/Chapter9/DomainModel/EventStore.php
@@ -9,8 +9,5 @@ interface EventStore
 {
     public function append(EventStream $eventStream): void;
     public function getEventsFor(string $id): EventStream;
-
-    public function fromVersion(string $id, int $version): EventStream;
-    public function countEventsFor(string $id): int;
 }
 //end-snippet
\ No newline at end of file
diff --git a/src/Cheeper/Chapter9/Infrastructure/DomainModel/RedisEventStore.php b/src/Cheeper/Chapter9/Infrastructure/DomainModel/RedisEventStore.php
index bc7fc3b..ebf4833 100644
--- a/src/Cheeper/Chapter9/Infrastructure/DomainModel/RedisEventStore.php
+++ b/src/Cheeper/Chapter9/Infrastructure/DomainModel/RedisEventStore.php
@@ -48,12 +48,12 @@ class RedisEventStore implements EventStore
 
     public function getEventsFor(string $id): EventStream
     {
-        return $this->fromVersion($id, 0);
+        return $this->fromVersion($id);
     }
 
-    public function fromVersion(string $id, int $version): EventStream
+    private function fromVersion(string $id, int $version = 0): EventStream
     {
-        $serializedEvents = (array) $this->redis->lrange(
+        $serializedEvents = $this->redis->lrange(
             'events:' . $id,
             $version,
             -1
@@ -74,10 +74,5 @@ class RedisEventStore implements EventStore
 
         return new EventStream($id, $events);
     }
-
-    public function countEventsFor(string $id): int
-    {
-        return (int) $this->redis->llen('events:' . $id);
-    }
 }
 //end-snippet
\ No newline at end of file