Joining in the wool at needle point?
I am knitting a duck from a book published in 1947. I have knitted several rows of 30 stitches and then knit 10 stitches, cast off 10 stitches and knitted the remaining 10 stitches. I have then carried on knitting the last set of 10 stitches to form the head. My pattern now tells me to cast off these stitches and join the wool at needle point to continue knitting the other set of stitches for the tail. I am not sure what this means.
Do I cast off in the normal manner, breaking the thread and pulling it through the last stitch and then start knitting the tail section leaving a long end to darn in when its finished? This is the only way I can think of doing it but I'm worried the tail might unravel.
Any advice would be greatly appreciated,