Help with old english knitting directions

Hey all, me again!

I am posting on behalf of a friend who has been asked to knit some socks
from an old english pattern, circ. 1940'ish.

this is this part that she is having problems with, can any of you
knitted brained wonders help please???

D-1/2"-5
I-1/2"-10
B-4-2R-8

There are no gaps, what you are seeing above is exactly how it is
written. I can't figure it out, and neither can she which is saying
something as she is a very experienced knitter but these have her
stumped!! they are not following on from each other, but they are the
only instructions that just don't make sense to her...

Any and all advice is, as always, appreciated!!

Rach