There are two* ways to finish the Stay-at-Home Auxiliary Scarf: with a knitted border, which was the original idea but will definitely take some stitch management, or with i-cord, which might be easier, given the length of the edges of the 14-square scarf.
For the knitted border, you’ll need the longest circular needle available (I used a 48”/120cm needle, and it was tough going); for the i-cord, two DPNs are recommended.
*Or two ways I am going into, I guess.
The I-cord border can be worked over 3 or 5 sts, depending on your preference. Two double pointed needles (in size used for overall gauge) will make it easier, but this can also be done with a circular, if you can’t find your DPNs and are only doing a few rounds to show how the technique should work. This is a weird, unlikely scenario, though, in no way related to the photos. (The sentence preceding this one is not sincere. I could not find my DPNs. I did the thing I am talking about.)
When finishing the 14th square, do not bind off.
This will leave you with 3 live sts.
Switch to DPNs.
(For the 5 st version only: flip to the WS, and, using the cable cast-on method, add 2 sts.)
Work attached I-cord border:
*slide sts to working end of the needle.
k2(4), slip last st as if to knit, pick up 1 st from next selvedge.
k last st tog with picked-up st, as if working a ssk.*
Repeat ** until i-cord edging has been applied all the way around. On the corners, you can pick up 2 sts in the same selvedge or cast-on bump, but other than that, pick up 1 st per selvedge.
Finish i-cord by weaving the live sts together with the first sts, as if working Kitchener st.
Weave in ends, block, and you’re done!
(This version was the original, but it can be genuinely tricky to keep >902 sts on a long circular needle. Putting the project down can result in mild heartbreak and dozens of stitches popping off; there is a palpable risk of breaking a wooden needle. Mine held up, but it was a close thing for a while.)
Finish the 14th square according to the line instructions. You’ll be left with 1 live stitch on the needle.
Pick Up Sts.
With the RS facing up, working right to left, pick up 30 sts per each mitered square, for a total of about 420 sts. (See Note, below.)
Turn work 90 degrees. Pick up ~31 sts along this side. Place a removable marker on the first and 31st sts.
Turn work 90 degrees. Pick up ~420 sts along the side.
Turn work 90 degrees. Pick up ~30 sts along this side. Place a removable marker on the first st, and on the live stitch from the bindoff.
There will be about 902 sts.
Note: the exact number of stitches, especially on the long edges, isn’t too important; the instructions that follow will still be functional if the stitch counts are slightly off.
Work continues from here in the round.
Round 1. [k1, p to next marked st] around.
Round 2. [k1, m1l, k to next marked st, m1r] around (8 sts inc) 910 sts total.
Repeat Rounds 1 & 2 two more times. (926 sts total)
End with a repeat of Round 2.
Bind off using the basic method. Break yarn, weave in ends, and block!