diff --git a/whisper/envelope.go b/whisper/envelope.go
index f9254843c..8e66a7bbb 100644
--- a/whisper/envelope.go
+++ b/whisper/envelope.go
@@ -12,7 +12,7 @@ import (
 )
 
 const (
-	DefaultTtl = 50 * time.Second
+	DefaultPow = 50 * time.Millisecond
 )
 
 type Envelope struct {
@@ -56,7 +56,7 @@ func NewEnvelope(ttl time.Duration, topics [][]byte, data *Message) *Envelope {
 }
 
 func (self *Envelope) Seal() {
-	self.proveWork(DefaultTtl)
+	self.proveWork(DefaultPow)
 }
 
 func (self *Envelope) proveWork(dura time.Duration) {
diff --git a/whisper/peer.go b/whisper/peer.go
index 3471ddb2f..d42b374b5 100644
--- a/whisper/peer.go
+++ b/whisper/peer.go
@@ -81,11 +81,16 @@ func (self *peer) broadcast(envelopes []*Envelope) error {
 		if err := self.ws.WriteMsg(msg); err != nil {
 			return err
 		}
+		self.peer.Infoln("broadcasted", i, "message(s)")
 	}
 
 	return nil
 }
 
+func (self *peer) addKnown(envelope *Envelope) {
+	self.known.Add(envelope.Hash())
+}
+
 func (self *peer) handleStatus() error {
 	ws := self.ws
 
diff --git a/whisper/whisper.go b/whisper/whisper.go
index 255bd2152..78e4d4848 100644
--- a/whisper/whisper.go
+++ b/whisper/whisper.go
@@ -2,6 +2,7 @@ package whisper
 
 import (
 	"bytes"
+	"fmt"
 	"sync"
 	"time"
 
@@ -34,6 +35,8 @@ const (
 	envelopesMsg = 0x01
 )
 
+const defaultTtl = 50 * time.Second
+
 type Whisper struct {
 	pub, sec []byte
 	protocol p2p.Protocol
@@ -55,6 +58,8 @@ func New(pub, sec []byte) *Whisper {
 	}
 	go whisper.update()
 
+	whisper.Send(defaultTtl, nil, NewMessage([]byte("Hello world. This is whisper-go")))
+
 	// p2p whisper sub protocol handler
 	whisper.protocol = p2p.Protocol{
 		Name:    "shh",
@@ -102,6 +107,7 @@ func (self *Whisper) msgHandler(peer *p2p.Peer, ws p2p.MsgReadWriter) error {
 		}
 
 		self.add(envelope)
+		wpeer.addKnown(envelope)
 	}
 }
 
@@ -110,6 +116,7 @@ func (self *Whisper) add(envelope *Envelope) {
 	self.mmu.Lock()
 	defer self.mmu.Unlock()
 
+	fmt.Println("add", envelope)
 	self.messages[envelope.Hash()] = envelope
 	if self.expiry[envelope.Expiry] == nil {
 		self.expiry[envelope.Expiry] = set.NewNonTS()