Work your way around the head in concentric circles with the mohair until you get near the top. This is where I would switch to a white glue. Here are some photos of how it looks while I am applying the mohair.

Step ten: applying the hair all around head
As you can see in the last photo above, the hair is laying flat on top of the head and not quite natural. I came up with a technique that creates a much more natural looking top of the hair. I brush on a small section of white glue on the top of the head, as shown in the photo below. It is a messy procedure, but works well.

Step eleven: applying the glue to the top of head
Now, instead of laying the hair down flat like we have been doing, we are going to insert the ends of the hair straight down into the glue, as if we are planting it. See next photo.

Step twelve: "Planting" the top hair