Page 51 - Barbara Merry "The Splicing Handbook"

Now pull out more core, this time from the standing part of the rope, and
measure one short fid length from the single hash mark. (Short and long fid
lengths are marked on tubular fids; for the measurement in inches, see page 12.)
Make two hash marks there (see drawing next page).

Continue along the core for one full fid length plus one short fid length,
pulling out more from the standing part if necessary. Make three hash marks.

For maximum strength in the splice, you will need to draw the rope’s outer
coat into its core and then its core into the coat. It will help to remember that the
coat is marked with letters and the core with hash marks.
Pinch the taped end of the coat and insert it into the hollow end of the fid,
taping it in place. Push the fid into the core at two hash marks and out at three
hash marks. Be careful not to twist the coat. Pull until the R comes into view.
The core will bunch up as you do so, but this will correct itself later.