This pattern is available from Payhip via the pattern website linked above, or from LoveCrafts here - priced Euros.

Tyto Alba and Barn Yarn are both available directly from Susan Crawford Vintage

Tyto Alba is worked from the bottom up in the round and features a striking central cabled panel complemented by a slipped stitch pattern to create a warm, bouncy fabric for those chilly days. The difference in the row gauge of the two patterns is used to positive effect, creating a dramatically shaped front section which sits perfectly where your coat closes; at the back there is less bulk, so the cowl sits comfortably against the back collar. Short rows are worked at the top of the cowl back to keep out those chilly winds!

Both written and charted instructions are provided.

Yarn
Susan Crawford Barn - 100% British wool, a unique blend of Jacob, white Shetland and black Shetland fleeces, DK weight, (225m / 246yds per 100g skein approx)
1 skein in the shade Dry Stone Wall

Gauge
15 sts and 43 rounds = 10cm (4in) over the Elongated Purl Slip Stitch Pattern (as show in pattern Chart B) knitted in the round, after blocking.

Suggested needles
5mm (US 8) circular needle (40 – 60cm in length)
5mm (US 8) cable needle

Notions
2 Stitch markers
tapestry needle for sewing in ends

Measurements - after blocking:

Height at centre front: 22. 5 cm / 9 inches
Height at sides and back 20cm / 8 inches
Circumference at base of cowl 76 cm / 30.5 inches
Circumference at top of cowl 51 cm / 20.6 inches

Techniques:
Knitting in the round
Working cables
Slipping stitches
knit, purl, yo, knitting stitches together
German Twisted cast on or preferred stretchy cast on
German short rows