diff --git a/ch12_mining.adoc b/ch12_mining.adoc
index 4fe1fddc..38291818 100644
--- a/ch12_mining.adoc
+++ b/ch12_mining.adoc
@@ -694,7 +694,7 @@ the header before a version is found that satisfies the((("bitcoins", "mining",
 === Mining the Block
 
 Now
-that((("candidate blocks", "mining")))((("blocks", "candidate blocks", "mining")))((("mining", "candidate blocks")))((("bitcoins", "mining", "candidate blocks"))) a candidate block has been constructed by Jing's node, it is time
+that((("candidate blocks", "mining", id="candidate-mine")))((("blocks", "candidate blocks", "mining", id="block-candidate-mine")))((("mining", "candidate blocks", id="mining-candidate")))((("bitcoins", "mining", "candidate blocks", id="bitcoin-mining-candidate"))) a candidate block has been constructed by Jing's node, it is time
 for Jing's hardware mining rig to "mine" the block, to find a solution
 to the Proof-of-Work algorithm that makes the block valid. Throughout
 this book we have studied cryptographic hash functions as used in
@@ -998,7 +998,7 @@ possible with the current generation of silicon fabrication, converting
 electricity into hashing computation at the highest rate possible. The
 primary influence on the mining market is the price of one kilowatt-hour
 of electricity in bitcoin, because that determines the profitability of
-mining and therefore the incentives to enter or exit the mining
+mining and therefore the incentives to enter or exit the ((("candidate blocks", "mining", startref="candidate-mine")))((("blocks", "candidate blocks", "mining", startref="block-candidate-mine")))((("mining", "candidate blocks", startref="mining-candidate")))((("bitcoins", "mining", "candidate blocks", startref="bitcoin-mining-candidate")))mining
 market.
 
 [[mtp]]