No gauge, yardage is:
1 ball of Columbia Mercerized Crochet (Art. 200) No. 30 in white
2 balls of Columbia Mercerized Crochet (Art. 571) No. 70 in pink or blue
1 ball of Columbia Sylvia in yellow

Columbia Steel Crochet Hook, No. 9

CH - Chain
Sl. St - Slip stitch
Sg. C. - Single crochet
D. C. - Double crochet
H. Tr. - Half treble
Tr. - Treble crochet
P. - Picot
M. - Mesh
* - Means that the directions given between these are to be repeated.

Half Treble (H. Tr.) this term was used where the thread was would around hook two, three, or more times, and worked off by 2 at a time, retaining last stitch on needle until all the half treble were made and worked off in the last stitch. (see pgs 4-5 First stitches cotton crocheting)
Picot (P.) make a chain of 3 or more stitches as indicated in directions, insert hook into first chain stitch made, and work off as single crochet.
Mesh (M.) used in filet crochet, chain 2 stitches, skip 2 stitches, 1 D.C. into next stitch.

Pieces worked flat separately, joined together and seams covered with “enough of the small roses to go all around the cap, and around the two seams on sides.” These are sewn on with a french knot. Instructions for roses given.