A book of photographs called "Isle of Man, Then and Now- A Photographic Journey" was published by Celt Investments in 1996 and sponsored by Lloyds Tsb to commemorate 100 years on the island.
One of the photographs shows Pulrose Mill and mentions it being near Millmount House.
My best guess is that it is near Kewaigue, on the river, looking back towards the hill of the 2nd hole on the golf course.
I've seen this book in the museum shop and Strand St. book shops.
Len Faragher