Heavy frost adds another dimension to the cup and ring markings at Achnabreck, Argyll, Scotland.

Snowfall overnight has transforming the landscape and monuments of Kilmartin Glen, Argyll, Scotland.

I've recently joined Kilmartin Museum as a Project Manager and Researcher.

An afternoon walk on the hills above Achiltibuie, northwest Scotland, included spectacular views and atmospheric optical effects.

This afternoon, the low winter sun cast a subtle circular halo in the sky above Balnakei in the far northwest of Scotland.

This afternoon, I viewed a distinctive mirage across the surface of the sea near the town of Ardrossan on the west coast of Scotland.

Reflecting upon natural monuments in Argyll

Dynamic views and changing sunlight across the Sound of Jura, Argyll, Scotland.

We had just finished excavating a rock art site in Strath Tay, but one final surprise awaited: the antics of hungry red squirrels as we packed up at the end of the project.

The final day of the excavation. We complete the digging and recording, reflect upon possible interpretations of this unusual site.

Today we fully explored potential features in the main trench, seeking to determine if a prehistoric cairn had been built on the outcrop.

Storm Ali has been forecast to hit Scotland with strong winds and heavy rain this afternoon. We work on the site until conditions become impossible.

Most of today was spent recording features before we can excavate further.

A grey day, but we continue to try and determine where we are seeing a prehistoric cairn, or the remains of later activities.

The new trench below the rock art is completed and the possible kerb stones begin to look ambiguous.

As the excavation begins to take shape, we expand our digging to either side of the cup marked rock.

The trench has been prepared for recording.

Another bright day in which we trowel back the trench and are visited by rock art doyen, George Currie.

A bright and sunny day. We continued to tidy up the main trench revealing more cobbles and a cup mark.

The first in a new series of BBC TV's Grand Tours of Scotland's Lochs was broadcast this week, and the first episode features an interview with me at a rock art site in western Scotland.