| Clark | E. C. | Narra Tarra, via Geraldton | OQ1 | 1924 |
| Clark | E. Victor | Muchea | XU2 | 1924 |
| Clark | F. E. | Silver Wattle, Wyalcatchem | 8FE | 1924 |
| Clark | Fredk. | Vigo Farm, Bullaring | YD4 | 1924 |
| Clark | G. A. | Avon Loc. 14547, Ardath | Z6Y | 1924 |
| Clark | G. B. & p. J. | Plant. 4705, Porongorups, via Mt. Barker | GP2 and 3E, 44D | 1962 |
| Clark | G. E. | Lyndale, Bullaring | GC5 and 15D, 45E | 1962 |
| Clark | G. H. | Locs. 371, 558, etc., Wagin | GK9 | 1924 |
| Clark | Geo. W. | York | GC7 | 1912 |
| Clark | Geo. W. | York | GC7 | 1924 |
| Clark | H. F. | Lot 60, 61, Pt. 62, Forrestdale | 5CH and 22B, 80E | 1962 |
| Clark | H. J. | Loc. 11438 Avon, Ulva | 6CH and 120E, 33D | 1962 |
| Clark | H. L. T. | Mile, West Arthur | 5HC | 1912 |
| Clark | H. L. T. | Mile, West Arthur | 5HC | 1924 |
| Clark | J. | Canning Loc. Ptn. 19 Lot 5, Cannington | 5CK and 102C, 118A | 1962 |
| Clark | J. A. | Clover Leaf Dairy, Beechboro, Guildford | U3C | 1924 |
| Clark | J. K. | Glenroy Station, Onslow | 3YY and 9B, 18A | 1962 |
| Clark | J. R. | Lake View, Kukerin | GJ7 and 41D, 110E | 1962 |
| Clark | J. W. | Chesterfields, Bridgetown | JC4 | 1962 |
| Clark | James | Glenroy, near Onlsow, Victoria Avenue, Claremont | 3YY | 1924 |
| Clark | John | Sandy Spring, Bridgetown | 4CJ | 1912 |
| Clark | John | Greenbushes | CK0 | 1912 |
| Clark | John | Commonage, Yalgoo | CK9 | 1912 |
| Clark | John | Sandy Spring, Bridgetown | 4JC | 1924 |
| Clark | John | Greenbushes | CK0 | 1924 |
| Clark | John | Commonage, Yalgoo | CK9 | 1924 |
| Clark | John | Denmark | K4L | 1924 |
| Clark | Joseph A. | Common, Collie | 2VC | 1924 |
| Clark | Mathew | Whiteside, Mt. Stirling | 8CM | 1912 |
| Clark | Matthew | Whiteside, Mt. Stirling | 8CM | 1924 |
| Clark | Onslow McKay | Onslow | O9C | 1924 |
| Clark | R. C. | Newbridge Farm, Darkan | RC4 | 1912 |
| Clark | R. C. | Newbridge Farm, Darkan | RC4 | 1924 |
| Clark | R. C. | Shactions (Loc. 14547), Ardath | Z6Y and 50D, 30E | 1962 |
| Clark | R. E. & E. G. | 49, 50, Gosnells | DU9 and 84C, 21E | 1962 |
| Clark | R. F. W. | Vic. Loc. 7203, Duneville, Carnamah | 9RF and 80A, 28C | 1962 |
| Clark | R. J. P. | Avon Stud Farm, Lang, Lawford, via Doodlakine | D7C | 1924 |
| Clark | R. W. | Vic. Loc. 7178, 7179, Carnamah | 4RX and 116B, 29A | 1962 |
| Clark | Roger W. | Vic. Loc. 7178, Carnamah | 4RX | 1924 |
| Clark | S. H. J. N. | Range Station, Onslow | 0NC and 6A, 8B | 1962 |
| Clark | Samuel | Clarkestown, Belka | ZC6 | 1924 |
| Clark | T. & Z. | Avon 9767, 9768, 9769, 9770, Bullaring | TC6 and 13C, 113E | 1962 |
| Clark | W. G. | Mooradale, Moora | 7CL | 1912 |
| Clark | W. G. | Day Dawn | CL5 | 1912 |
| Clark | W. M. & M. F. | Pilwarren, Wialki | CP6 and 22C, 80E | 1962 |
| Clark | Wm. C. | Lot 443, Circle Valley, via Norseman | 3ZB | 1924 |
| Clark | Wm. E. | Tyrone, Wagin | WC4 | 1912 |
| Clark | Wm. E. | Tyrone, Wagin | WC4 | 1924 |
| Clark | Wm. Hy. | Tin Area, Greenbushes | WV8 | 1924 |
| Clark | Wm. Thos. | Culcurring, Moulyinning | 9OC | 1924 |
