Then I pinned the sleeves. What was a mystery to me was the way the sleeve lining was stitched around the armholes. From the experience of sewing 17th century costumes, I connect the sleeve lining with the rest of the lining by a long strip that I sew around the armhole circumference. Nothing was mentioned in the instructions for this, and I did not find this information anywhere during making my houppelande. So I joined the lining in the way I do it for my costumes for the 17th century, but later I examined this detail in The Medieval Tailor's Assistant: Making Common Garments, 1200-1500, and in the passage about lining (p. 51), I found out that in this period, the lining of the sleeves was probably not sewn in this way, or rather I did not find anything about its sewing in the way I know from the 17th century in this book. However, it is the only publication in which I have been looking for this information so far and I will have to go even further.