diff --git a/libethcore/BlockInfo.cpp b/libethcore/BlockInfo.cpp
index fc715db65..38d1755d7 100644
--- a/libethcore/BlockInfo.cpp
+++ b/libethcore/BlockInfo.cpp
@@ -88,11 +88,6 @@ void BlockInfo::streamRLPFields(RLPStream& _s) const
 		<< m_difficulty << m_number << m_gasLimit << m_gasUsed << m_timestamp << m_extraData;
 }
 
-h256 BlockInfo::headerHashFromBlock(bytesConstRef _block)
-{
-	return sha3(RLP(_block)[0].data());
-}
-
 RLP BlockInfo::extractHeader(bytesConstRef _block)
 {
 	RLP root(_block);
diff --git a/libethcore/BlockInfo.h b/libethcore/BlockInfo.h
index c0082d7cb..ae56342c5 100644
--- a/libethcore/BlockInfo.h
+++ b/libethcore/BlockInfo.h
@@ -79,7 +79,6 @@ DEV_SIMPLE_EXCEPTION(GenesisBlockCannotBeCalculated);
  */
 class BlockInfo
 {
-	friend class BlockChain;
 public:
 	static const unsigned BasicFields = 13;
 
@@ -87,8 +86,6 @@ public:
 	explicit BlockInfo(bytesConstRef _data, Strictness _s = CheckEverything, h256 const& _hashWith = h256(), BlockDataType _bdt = BlockData);
 	explicit BlockInfo(bytes const& _data, Strictness _s = CheckEverything, h256 const& _hashWith = h256(), BlockDataType _bdt = BlockData): BlockInfo(&_data, _s, _hashWith, _bdt) {}
 
-	static h256 headerHashFromBlock(bytes const& _block) { return headerHashFromBlock(&_block); }
-	static h256 headerHashFromBlock(bytesConstRef _block);
 	static RLP extractHeader(bytesConstRef _block);
 
 	explicit operator bool() const { return m_timestamp != Invalid256; }
@@ -116,16 +113,7 @@ public:
 	h256 const& parentHash() const { return m_parentHash; }
 	h256 const& sha3Uncles() const { return m_sha3Uncles; }
 
-	void setParentHash(h256 const& _v) { m_parentHash = _v; noteDirty(); }
-	void setSha3Uncles(h256 const& _v) { m_sha3Uncles = _v; noteDirty(); }
-	void setTimestamp(u256 const& _v) { m_timestamp = _v; noteDirty(); }
-	void setCoinbaseAddress(Address const& _v) { m_coinbaseAddress = _v; noteDirty(); }
-	void setRoots(h256 const& _t, h256 const& _r, h256 const& _u, h256 const& _s) { m_transactionsRoot = _t; m_receiptsRoot = _r; m_stateRoot = _s; m_sha3Uncles = _u; noteDirty(); }
-	void setGasUsed(u256 const& _v) { m_gasUsed = _v; noteDirty(); }
 	void setNumber(u256 const& _v) { m_number = _v; noteDirty(); }
-	void setGasLimit(u256 const& _v) { m_gasLimit = _v; noteDirty(); }
-	void setExtraData(bytes const& _v) { m_extraData = _v; noteDirty(); }
-	void setLogBloom(LogBloom const& _v) { m_logBloom = _v; noteDirty(); }
 	void setDifficulty(u256 const& _v) { m_difficulty = _v; noteDirty(); }
 
 	Address const& beneficiary() const { return m_coinbaseAddress; }
@@ -174,14 +162,6 @@ private:
 	mutable h256 m_boundary;					///< 2^256 / difficulty
 };
 
-inline std::ostream& operator<<(std::ostream& _out, BlockInfo const& _bi)
-{
-	_out << _bi.hashWithout() << " " << _bi.parentHash() << " " << _bi.sha3Uncles() << " " << _bi.beneficiary() << " " << _bi.stateRoot() << " " << _bi.transactionsRoot() << " " <<
-			_bi.receiptsRoot() << " " << _bi.logBloom() << " " << _bi.difficulty() << " " << _bi.number() << " " << _bi.gasLimit() << " " <<
-			_bi.gasUsed() << " " << _bi.timestamp();
-	return _out;
-}
-
 template <class BlockInfoSub>
 class BlockHeaderPolished: public BlockInfoSub
 {
@@ -191,10 +171,6 @@ public:
 	explicit BlockHeaderPolished(bytes const& _data, Strictness _s = IgnoreSeal, h256 const& _h = h256(), BlockDataType _bdt = BlockData) { populate(&_data, _s, _h, _bdt); }
 	explicit BlockHeaderPolished(bytesConstRef _data, Strictness _s = IgnoreSeal, h256 const& _h = h256(), BlockDataType _bdt = BlockData) { populate(_data, _s, _h, _bdt); }
 
-	// deprecated - just use constructor instead.
-	static BlockHeaderPolished fromHeader(bytes const& _data, Strictness _s = IgnoreSeal, h256 const& _h = h256()) { return BlockHeaderPolished(_data, _s, _h, HeaderData); }
-	static BlockHeaderPolished fromHeader(bytesConstRef _data, Strictness _s = IgnoreSeal, h256 const& _h = h256()) { return BlockHeaderPolished(_data, _s, _h, HeaderData); }
-
 	// deprecated for public API - use constructor.
 	// TODO: make private.
 	void populate(bytesConstRef _data, Strictness _s, h256 const& _h = h256(), BlockDataType _bdt = BlockData)
@@ -243,13 +219,6 @@ public:
 		if (_i == WithProof)
 			BlockInfoSub::streamRLPFields(_s);
 	}
-
-	bytes sealFieldsRLP() const
-	{
-		RLPStream s;
-		BlockInfoSub::streamRLPFields(s);
-		return s.out();
-	}
 };
 
 }
diff --git a/libethcore/Ethash.h b/libethcore/Ethash.h
index 08f380f91..7a3a80a59 100644
--- a/libethcore/Ethash.h
+++ b/libethcore/Ethash.h
@@ -58,7 +58,6 @@ public:
 	public:
 		h256 const& seedHash() const;
 		Nonce const& nonce() const { return m_nonce; }
-		h256 const& mixHash() const { return m_mixHash; }
 
 	protected:
 		BlockHeaderRaw() = default;
diff --git a/libethcore/Miner.h b/libethcore/Miner.h
index 58fdbbbd2..126d3c430 100644
--- a/libethcore/Miner.h
+++ b/libethcore/Miner.h
@@ -231,9 +231,6 @@ private:
 
 	WorkPackage m_work;
 	mutable Mutex x_work;
-
-	
-	bool m_dagLoaded = false;
 };
 
 }