I feel a bit neglectful of my lovely gentleman. He rarely gets my knits. So here is some redress.
The design is Thendara by Stephen West.
The yarn is a discontinued Pear Tree yarn, 100% merino 4ply that I bought in bulk at the Bendigo Sheep and Wool Show many years ago. I think I bought 1 kilo of grey. I cannot remember why. It is too soft and unstructured to make a cardigan from but it does make lovely baby clothes and shawls. It is quite bulky for a 4ply/fingering weight so it happily took to the 3.75 mm needles to make a firm but drapey fabric. To get my colour contrast, I over-dyed a single hank with some Earth Palette black. I just mixed the dye up, put in a plastic bag with the skein and left it out the back for a day. The black dye must have had a blue base as it just made the grey, darker and bluer.
Then, just lots of lovely straight up stripes, garter stitch and slipped stitches. I worked this without any modifications. It is a really excellent pattern and design. Ravelled here.