| BRITISH COLUMBIA ARTISTS |
He exhibited artwork in the First and Second Exhibitions of the Island Arts & Crafts Society in 1910 and 1911.
Middleton was listed as an Architect in the list of exhibitors. The 1910-11 Victoria City Directory lists him as "artist" living at 830 Queens Ave.
Middleton died in Victoria in 1951 at the age of 86. He was a retired architect, who had worked for the Provincial Government for 27 years.
GROUP EXHIBITIONS
| DATE | EXHIBITION | ARTWORK |
| 1910 September | IACS 1st Annual Exhibition | Tintagel, Cornwall |
| Trebarwith Sands | ||
| Boscastle Cliffs, N. Cornwall | ||
| Trebarwith Cornwall, A Stiff Breeze | ||
| Ger Tor on Tavy, Dartmoor Devon | ||
| Moorland Cottage, Dartmoor | ||
| The Angler's Haunt, Tavy River | ||
| Trebarwith Sands, Cornwall | ||
| The Fringe of the Moor | ||
| Plymouth, Entrance to Harbour | ||
| A Moorland Stream | ||
| Bude, Low Tide | ||
| 1911 Oct. 5 - 7 | IACS Alexandra Club 2nd Annual | A Corner of the Park |
| Summer Calm | ||
| Dartmoor Heather | ||
| Summer Haze | ||
| The Late Songhees Reserve | ||
| Kanaka Rocks | ||
| Broom on Pandora Street | ||
| Design for Drill Hall (with Ridgway Wilson) |