Seenu,
At this stage of the drawing and with your reference close at hand, you might enjoy practicing some of the techniques discussed elsewhere in the Forum for
getting a likeness. (Click on those words to be taken to that discussion.) Using some of those techniques, I'll point out a few areas that you might take another look at. The King's countenance is perhaps one of the most recognizable in the world (until he became unrecognizable later in life), so you'll want to get a hold on every characterizing angle and proportion.
I don't mention these areas just to be hyper fussy but because further attention to them will enhance likeness:
1- The chin in the drawing is rounder and smaller than in the reference.
2- The bottom edge of the lower lip should be flatter for a longer time as it goes to our left. Pay careful attention to the shape of the shadow under that lip, as it describes not only the lip but the shape of the upper chin.
3- The corners of the mouth turn up slightly in the drawing. They turn down in the photo. The upper lip also has a fleshiness as it approaches the outside corners, so that the top edge dips down before it gets to the corners, then rises slightly again before dropping to the corners. That variation is missing in the drawing. This describes a very characterizing feature in the mouth of this particular subject.
4- The shadow shape under the nose needs to be very carefully drawn, in order to describe the "bulb" of the nose. Note especially how it should rise on our right for that purpose. Also the "wing" on the right side is too short (vertically), which is making the nose appear crooked (partly because the base of the wing on the other side is slightly high).
5- In the edge on our left, between the cheekbone and the eyebrow, there is a convex shape that should actually be concave. Note in the photo how the eyebrow seems to extend beyond the edge. In the drawing the flesh extends beyond the eyebrow. There's a bit of challenge in this area in the photo, because I think we're seeing a bit of the ear. Try to think about the shape of the skull in that area, particularly the depression alongside the eye socket.
Well, you get the idea. Hope that gets you thinking about close attention to those kinds of uniquely descriptive details.
Cheers