Endeavour is one of 16 glorious designs in Stranded Knits, a superb technique manual and pattern collection that Ann created for Rowan Yarns. The book is available from Rowan stockists.
The tension/gauge given above is for the plain stocking stitch/stockinette areas after blocking. The stranded tension/gauge is 18 stitches and 20 rounds after blocking.
You will also need a 26” zip.