diff --git a/src/TransactionMeta.cpp b/src/TransactionMeta.cpp
index 93f89652ef..b193afb48a 100644
--- a/src/TransactionMeta.cpp
+++ b/src/TransactionMeta.cpp
@@ -95,10 +95,9 @@ int TMNEAmount::compare(const TransactionMetaNodeEntry& e) const
 	return 0;
 }
 
-TMNEAccount::TMNEAccount(int type, SerializerIterator& sit) : TransactionMetaNodeEntry(type)
-{
-	mPrevAccount = sit.get256();
-}
+TMNEAccount::TMNEAccount(int type, SerializerIterator& sit)
+	: TransactionMetaNodeEntry(type), mPrevAccount(sit.get256())
+{ ; }
 
 void TMNEAccount::addRaw(Serializer& sit) const
 {
@@ -184,9 +183,14 @@ void TransactionMetaNode::addNode(TransactionMetaNodeEntry* node)
 	mEntries.push_back(node);
 }
 
-void TransactionMetaNode::thread(const uint256& prevTx, uint32 prevLgr)
+bool TransactionMetaNode::thread(const uint256& prevTx, uint32 prevLgr)
 {
-	// WRITEME
+	for (boost::ptr_vector<TransactionMetaNodeEntry>::iterator it = mEntries.begin(), end = mEntries.end();
+			it != end; ++it)
+		if (it->getType() == TMSThread)
+			return false;
+	addNode(new TMNEThread(prevTx, prevLgr));
+	return true;
 }
 
 Json::Value TransactionMetaNode::getJson(int v) const
diff --git a/src/TransactionMeta.h b/src/TransactionMeta.h
index a6650a7b28..e3a5f359eb 100644
--- a/src/TransactionMeta.h
+++ b/src/TransactionMeta.h
@@ -69,6 +69,9 @@ protected:
 
 public:
 	TMNEThread() : TransactionMetaNodeEntry(TMSThread) { ; }
+	TMNEThread(uint256 prevTx, uint32 prevLgrSeq)
+		: TransactionMetaNodeEntry(TMSThread), mPrevTxID(prevTx), mPrevLgrSeq(prevLgrSeq)
+	{ ; }
 	TMNEThread(SerializerIterator&);
 
 	virtual void addRaw(Serializer&) const;
@@ -143,7 +146,7 @@ public:
 	bool operator>(const TransactionMetaNode& n) const	{ return mNode > n.mNode; }
 	bool operator>=(const TransactionMetaNode& n) const	{ return mNode >= n.mNode; }
 
-	void thread(const uint256& prevTx, uint32 prevLgr);
+	bool thread(const uint256& prevTx, uint32 prevLgr);
 
 	TransactionMetaNode(int type, const uint256& node, SerializerIterator&);
 	void addRaw(Serializer&);