Highland Tpo Up Southern Section - Information Sought

Can anyone supply any information about this mark please.

What I would like to know is departure and arrival points of the route, any stops en route and whether there is anything unusual or interesting about the one scanned.

The Highland entry on Page 257 of the S.G. Collect British Postmarks (9th edition) gives a listing for type e.
However this mark is just like type f which is a station postmark. (There is no listing for type f under Highland TPO).

I have googled without success so any help would be very much appreciated.

Is there something unusual or special about the narrow H that a previous owner drew an arrow to.

Thanks and regards.
Ron