| Clarkson | J. | Pearler | Cossack | 1881 | Herald Almanack |
| Clarkson | J. | Sheepowner | Newcastle & Toodyay District | 1881 | WA Almanack |
| Clarkson | J. | Pearler | North-West Coast (Cossack) | 1881 | WA Almanack |
| Clarkson | J. | Pearler | Cossack | 1882 | Herald Almanack |
| Clarkson | J. | Sheepowner | Newcastle & Toodyay District | 1882 | WA Almanack |
| Clarkson | J. | Grazier and Pearler | North-West Coast (Maitland River) | 1882 | WA Almanack |
| Clarkson | J. | Pearler | Cossack | 1883 | Herald Almanack |
| Clarkson | J. | Pearler | Cossack | 1884 | Herald Almanack |
| Clarkson | J. | Sheepowner | Newcastle & Toodyay District | 1884 | WA Almanack |
| Clarkson | J. | Pearler & Grazier | Cossack | 1885 | Herald Almanack |
| Clarkson | J. | Flockowner | Toodyay | 1886 | WA Almanack |
| Clarkson | J. & K. | Sheepfarmers | North-West Coast (Maitland River) | 1884 | WA Almanack |
| Clarkson | J. & K. | Sheep Farmer | North-West Coast (Maitland River) | 1886 | WA Almanack |
| Clarkson | J. & R. | Graziers | Maitland River | 1885 | Herald Almanack |
| Clarkson | J. & R. | Sheep Farmers | North-West (Maitland River) | 1887 | WA Almanack |
| Clarkson | J. & R. | Sheepfarmers | North-West (Maitland River) | 1888 | WA Almanack |
| Clarkson | J. & R. | Sheep Farmers | North-West (Maitland River) | 1889 | WA Almanack |
| Clarkson | J. S. | Farmer | Swan | 1868 | WA Almanack |
| Clarkson | J. S. | Farmer & Grazier | Toodyay | 1868 | WA Almanack |
| Clarkson | J. S. | Farmer | Swan | 1869 | WA Almanack |
| Clarkson | J. S. | Farmer | Swan | 1870 | WA Almanack |
| Clarkson | J. S. | Farmer | Swan | 1872 | WA Almanack |
| Clarkson | J. S. | Farmer | Swan | 1873 | Herald Almanack |
| Clarkson | J. S. | Farmer | Swan | 1874 | Herald Almanack |
| Clarkson | J. S. | Farmer | Swan | 1875 | Herald Almanack |
| Clarkson | J. S. | Farmer | Swan | 1875 | WA Almanack |
| Clarkson | J. S. | Farmer | Swan | 1876 | Herald Almanack |
| Clarkson | J. S. | Farmer | Guildford | 1877 | Herald Almanack |
| Clarkson | J. S. | Farmer | Guildford & Swan | 1877 | WA Almanack |
| Clarkson | J. S. | Farmer | Guildford | 1878 | Herald Almanack |
| Clarkson | J. S. | Sheepowner | Toodyay | 1879 | WA Almanack |
| Clarkson | J.S. | Farmer | Swan | 1876 | WA Almanack |
| Clarkson | J.S. | Farmer | Guildford | 1879 | WA Almanack |
| Clarkson | James | Flockowner | Toodyay | 1878 | Herald Almanack |
| CLarkson | James | Flockowner | Toodyay | 1879 | Herald Almanack |
| Clarkson | James | Flockowner | Toodyay | 1880 | Herald Almanack |
| Clarkson | James | FlockOwner | Toodyay | 1881 | Herald Almanack |
| Clarkson | James | Flockowner | Toodyay | 1882 | Herald Almanack |
| Clarkson | James | Flockowner | Toodyay | 1883 | Herald Almanack |
| Clarkson | James | Flockowner | Toodyay | 1884 | Herald Almanack |
| Clarkson | Jas. | Farmer | West Guildford Road, Perth | 1873 | Herald Almanack |
| Clarkson | Jos. | Sheepfarmers | North-West Coast (Maitland River) | 1884 | WA Almanack |
| Clarkson | Joseph | Pearler | North-West Coast (Cossack) | 1884 | WA Almanack |
| Clarkson | M. | Farmer & Grazier | Northam | 1867 | WA Almanack |
| Clarkson | M. | Farmer & Grazier | Toodyay | 1868 | WA Almanack |
| Clarkson | Mrs, senr | Farmer | Newcastle | 1897 | Witton's Directory |
| Clarkson | R. | Grazier | Robe River | 1879 | Herald Almanack |
| Clarkson | R. | Grazier | Robe River | 1880 | Herald Almanack |
| Clarkson | R. | Graziers | North-West Coast (Robe River) | 1880 | WA Almanack |
| Clarkson | R. | Grazier | Robe River | 1881 | Herald Almanack |
