diff --git a/src/monger/collection.clj b/src/monger/collection.clj
index ad63627..fbbecb3 100644
--- a/src/monger/collection.clj
+++ b/src/monger/collection.clj
@@ -8,7 +8,7 @@
 ;; You must not remove this notice, or any other, from this software.
 
 (ns monger.collection
-  (:refer-clojure :exclude [find remove count])
+  (:refer-clojure :exclude [find remove count drop])
   (:import (com.mongodb Mongo DB DBCollection WriteResult DBObject WriteConcern DBCursor) (java.util List Map) (clojure.lang IPersistentMap ISeq))
   (:require [monger core result])
   (:use     [monger.convertion]))
@@ -174,11 +174,11 @@
 
 (defn ensure-index
   ([^String collection, ^Map keys]
-     (let [^DBCollection coll (.getCollection monger.core/*mongodb-database* collection)]
-       (.ensureIndex coll (to-db-object keys))))
+     (let [coll ^DBCollection (.getCollection monger.core/*mongodb-database* collection)]
+       (.ensureIndex ^DBCollection coll ^DBObject (to-db-object keys))))
   ([^String collection, ^Map keys, ^String name]
-     (let [^DBCollection coll (.getCollection monger.core/*mongodb-database* collection)]
-       (.ensureIndex coll (to-db-object keys) name))))
+     (let [coll ^DBCollection (.getCollection monger.core/*mongodb-database* collection)]
+       (.ensureIndex coll ^DBObject (to-db-object keys) ^String name))))
 
 
 ;;
@@ -205,6 +205,16 @@
   (.dropIndexes ^DBCollection (.getCollection monger.core/*mongodb-database* collection)))
 
 
+(defn exists?
+  [^String collection]
+  (.collectionExists monger.core/*mongodb-database* collection))
+
+(defn drop
+  [^String collection]
+  (let [^DBCollection coll (.getCollection monger.core/*mongodb-database* collection)]
+    (.drop coll)))
+
+
 ;;
 ;; Implementation
 ;;
diff --git a/test/monger/test/collection.clj b/test/monger/test/collection.clj
index cdbb762..dad1b85 100644
--- a/test/monger/test/collection.clj
+++ b/test/monger/test/collection.clj
@@ -382,3 +382,19 @@
            (:name (second (monger.collection/indexes-on collection)))))
     (monger.collection/ensure-index collection { "language" 1 })))
 
+
+;;
+;; exists?, drop
+;;
+
+(deftest checking-for-collection-existence-when-it-does-not-exist
+  (let [collection "widgets"]
+    (monger.collection/drop collection)
+    (is (false? (monger.collection/exists? collection)))))
+
+(deftest checking-for-collection-existence-when-it-does-exist
+  (let [collection "widgets"]
+    (monger.collection/drop collection)
+    (monger.collection/insert-batch collection [{ :name "widget1" }
+                                                { :name "widget2" }])
+    (is (monger.collection/exists? collection))))
\ No newline at end of file