The archaeological survey undertaken at Lake Innes House and the stables uncovered various types of bricks. The different sizes, and the range and placement of markings (known as frogs), suggest the bricks were made in different batches and by different makers. Frogs are marks pressed into bricks, used to identify a particular maker or brickyard. This brick, with a Maltese cross frog, was found at the bathroom site. This suggests that while Archibald Innes had bricks made on the estate, he also bought in bricks from elsewhere.