| Business | Phone |
| Archaeologix Inc 14 Oxford St W, London N6H 1P9 | (519) 642-7836 |
| Historica Research Ltd 1429 Southdale Rd W, London N6P 1M5 | (519) 473-1858 |
| Mayer Heritage Consultants Inc 1615 N Routledge Park #5, London N6H 5L6 | (519) 472-8100 |
| D R Poulton & Assoc Inc 69 Langarth St W, London N6J 1P5 | (519) 434-0319 |