Some corrective tips to the pattern:

• The mitten is knitted from fingers to the elbow.
• I needle means the first needle, II means the second needle and III means the third needle in the round.
• “From this point k always I and III needles.” means that you knit I and III needles and start to knit the pattern from the right down corner.
• The marking yarn can delighted be different color than the main color.
• When you have knitted the marking yarn, you have to put marking yarn stitches back to the previous needle and continue knitting with main color.