Doocot
As well as housing doves and pigeons, in Scots a doocot can refer to any cosy compartment or room. Immediately conveying a sense of comfort and enclosure, doocot is as fitting a word for a handknit sweater, as it is for the ad-hoc, urban doocots that are a familiar sight around Glasgow and its environs.
(See here for examples)

Yarn
Kate Davies Designs Schiehallion (100% Wool:70%
Corriedale, 30% Cheviot, 110m/120yds per 50g skein) 7 (8,
9, 9, 10, 10, 11, 12) skeins. If you wish to add length to the
body of the sweater, you may need more yarn.

Needles and notions
Gauge-size needle(s) of your preferred length for working
body and neck.
Gauge-size and below gauge-size needle(s) of your preferred type for working small circumferences (sleeves).
(Sample was worked on 3.75mm needle)
Stitch markers. Tapestry needle.

Gauge
22 sts and 28 rounds to 4 in over stockinette back and forth and in the round.

Sizing
Finished garment size at bust: 93 (103, 110.5, 118, 122, 129.5, 140, 147) cm / 36.5 (40.5, 43.5, 46.5, 48, 51, 55, 58) in Garment should be worn with 10-25cm / 4-10in positive ease at bust for a comfortable fit for layering (as shown). Shown in the first size with 23cm / 6in positive ease at the
bust.

Pattern notes
This sweater is worked from the top down, casting on a few stitches and increasing at an even rate to shape the front neckline, before joining the piece to be worked in the round. Raglan increases shape the upper body, the sleeve caps are divided and set aside, and the body is then worked in stockinette to just below the bust line. A rhythmic slipped stitch rib pattern then forms the lower body (which can be knitted cropped, as shown, or longer, if desired). The sleeves are worked top-down, with an easy fit and slightly gathered shape above the long slipped-stitch rib cuffs. Slipped-stitch rib also completes the neck edging (which is worked last).