Thanks for the help!
I am still wondering about one thing, however. The original 16 rows had increase stitches on each end of the 5th and 11th rows. I am unsure as to whether these are included in 'keeping continuity of patt. as set (throughout)', or whether they should be ignored and I just proceed with the new increases. The original increases are followed with expected subsequent stitch counts, which suggests to me that they are not intended to be repeated as part of the pattern in the future. Furthermore, if they are not to be repeated the rate of increase would remain constant from the start of the pattern (with 54 stitches) to the end of the stage that I am currently beginning (70 stitches), increases occuring every 6th row.
If I continue with the original increase stitches I will be increasing on the 1st, 5th, 7th, 11th, 13th and 19th rows, before I proceed to the next stage of the pattern (as I start this stage of the pattern with 58 stitches and should finish with 70).
Would such a rate of increasing be too rapid? How should I be reading the pattern here? Thank you once again for your help.