diff --git a/ch06.asciidoc b/ch06.asciidoc
index c5fc7d7d..cc4adf44 100644
--- a/ch06.asciidoc
+++ b/ch06.asciidoc
@@ -285,6 +285,19 @@ Hints:
 * The length of the +scriptSig+ is 139 bytes, or +8b+ in hex
 * The sequence number is set to +FFFFFFFF+, again easy to identify((("", startref="alicesix")))
 
+When scriptSigs are serialized for transmission on the network, their inputs are encoded into a byte stream as shown in <<ScriptSig input serialization>>.
+
+[[tx_in_structure]]
+.ScriptSig input serialization
+[options="header"]
+|=======
+|Size| Field | Description
+| 1&#x2013;9 bytes (VarInt) | Signature Size | Signature length in bytes, to follow
+| Variable | Signature | A signature that is produced by the user’s wallet from his or her private key, which includes a SIGHASH
+| 1&#x2013;9 bytes (VarInt) | Public Key Size | Public key length in bytes, to follow
+| Variable | Public Key | The public key, which is equivalent to a bitcoin address, without the Base58Check encoding
+|=======
+
 [[tx_fees]]
 ==== Transaction Fees