diff --git a/code/actors/src/consensus.rs b/code/actors/src/consensus.rs
index a9a52132c..59549a214 100644
--- a/code/actors/src/consensus.rs
+++ b/code/actors/src/consensus.rs
@@ -647,7 +647,7 @@ where
 
                         if state.connected_peers.len() == state.validator_set.count() - 1 {
                             info!(
-                                "Enough peers ({}) ready to start consensus",
+                                "Enough peers ({}) connected to start consensus",
                                 state.connected_peers.len()
                             );
 
@@ -663,7 +663,7 @@ where
                         // TODO: pause/stop consensus, if necessary
                     }
 
-                    GossipEvent::Message(_from, _, data) => {
+                    GossipEvent::Message(_, _, data) => {
                         let msg = NetworkMsg::from_network_bytes(data).unwrap(); // FIXME
 
                         let Some(msg_height) = msg.msg_height() else {
diff --git a/code/actors/src/gossip.rs b/code/actors/src/gossip.rs
index ee15d3fe5..f82d05f5f 100644
--- a/code/actors/src/gossip.rs
+++ b/code/actors/src/gossip.rs
@@ -1,3 +1,4 @@
+use std::collections::BTreeSet;
 use std::sync::Arc;
 
 use async_trait::async_trait;
@@ -51,8 +52,7 @@ pub struct Args {
 pub enum State {
     Stopped,
     Running {
-        expected_peers: Vec<PeerId>,
-        peers: Vec<PeerId>,
+        peers: BTreeSet<PeerId>,
         subscribers: Vec<ActorRef<Arc<Event>>>,
         ctrl_handle: CtrlHandle,
         recv_task: JoinHandle<()>,
@@ -95,8 +95,7 @@ impl Actor for Gossip {
         });
 
         Ok(State::Running {
-            expected_peers: args.peer_ids,
-            peers: Vec::new(),
+            peers: BTreeSet::new(),
             subscribers: Vec::new(),
             ctrl_handle,
             recv_task,
@@ -118,7 +117,6 @@ impl Actor for Gossip {
         state: &mut State,
     ) -> Result<(), ActorProcessingErr> {
         let State::Running {
-            expected_peers,
             peers,
             subscribers,
             ctrl_handle,
@@ -132,11 +130,16 @@ impl Actor for Gossip {
             Msg::Subscribe(subscriber) => subscribers.push(subscriber),
             Msg::Broadcast(channel, data) => ctrl_handle.broadcast(channel, data).await?,
             Msg::NewEvent(event) => {
-                if let Event::PeerConnected(peer_id) = event {
-                    if expected_peers.contains(&peer_id) {
-                        peers.push(peer_id);
+                match &event {
+                    Event::PeerConnected(peer_id) => {
+                        peers.insert(*peer_id);
                     }
+                    Event::PeerDisconnected(peer_id) => {
+                        peers.remove(peer_id);
+                    }
+                    _ => {}
                 }
+
                 let event = Arc::new(event);
                 for subscriber in subscribers {
                     subscriber.cast(Arc::clone(&event))?;
diff --git a/code/actors/src/node.rs b/code/actors/src/node.rs
index 7fa3639ea..6ede0d1dd 100644
--- a/code/actors/src/node.rs
+++ b/code/actors/src/node.rs
@@ -86,15 +86,15 @@ where
         params.gossip_mempool,
         params.mempool,
         proposal_builder,
-        // params.start_height,
+        params.start_height,
     );
 
     let actor = node.spawn().await?;
     Ok(actor)
 }
 
+#[allow(dead_code)]
 pub struct Node<Ctx: Context> {
-    #[allow(dead_code)]
     ctx: Ctx,
     cal: ActorRef<CALMsg<Ctx>>,
     gossip: ActorRef<GossipMsg>,
@@ -102,7 +102,7 @@ pub struct Node<Ctx: Context> {
     gossip_mempool: ActorRef<GossipMempoolMsg>,
     mempool: ActorRef<MempoolMsg>,
     proposal_builder: ActorRef<ProposalBuilderMsg<Ctx>>,
-    // start_height: Ctx::Height,
+    start_height: Ctx::Height,
 }
 
 impl<Ctx> Node<Ctx>
@@ -120,7 +120,7 @@ where
         gossip_mempool: ActorRef<GossipMempoolMsg>,
         mempool: ActorRef<MempoolMsg>,
         proposal_builder: ActorRef<ProposalBuilderMsg<Ctx>>,
-        // start_height: Ctx::Height,
+        start_height: Ctx::Height,
     ) -> Self {
         Self {
             ctx,
@@ -130,7 +130,7 @@ where
             gossip_mempool,
             mempool,
             proposal_builder,
-            // start_height,
+            start_height,
         }
     }
 
diff --git a/code/common/src/height.rs b/code/common/src/height.rs
index 2c9bef84e..c4722604e 100644
--- a/code/common/src/height.rs
+++ b/code/common/src/height.rs
@@ -7,18 +7,8 @@ use core::fmt::{Debug, Display};
 /// A height of 0 represents a chain which has not yet produced a block.
 pub trait Height
 where
-    Self: Default
-        + Copy
-        + Clone
-        + Debug
-        + Display
-        + PartialEq
-        + Eq
-        + PartialOrd
-        + Ord
-        + Send
-        + Sync
-        + From<u64>,
+    Self:
+        Default + Copy + Clone + Debug + Display + PartialEq + Eq + PartialOrd + Ord + Send + Sync,
 {
     /// Increment the height by one.
     fn increment(&self) -> Self;
diff --git a/code/test/src/height.rs b/code/test/src/height.rs
index b8cb81bd5..6ff5b507c 100644
--- a/code/test/src/height.rs
+++ b/code/test/src/height.rs
@@ -28,12 +28,6 @@ impl fmt::Debug for Height {
     }
 }
 
-impl From<u64> for Height {
-    fn from(height: u64) -> Self {
-        Self::new(height)
-    }
-}
-
 impl malachite_common::Height for Height {
     fn increment(&self) -> Self {
         Self(self.0 + 1)