I have extracted the following entries from the P.O. Directory for 1921/2. This was similar to a telephone book/yellow pages/local who's-who, and was organised in line with postal delivery routes. The first two routes were delivered from Castle Douglas, whilst the remainder are from the Dalbeattie District.

BUITTLE ROAD.

Kirkpatrick, John C., coal agent, Wheatcroft Farm, Kelton.
Martin, William ploughman,Torrs Cottages, Kelton.
Smith, James, ploughman, Torrs Cottages, Kelton.
Ferguson, Samuel, farm labourer, Torrs Cottages. Kelton.
Smith, John, jun., dairyman, Upper Torrs.
Smith, John, farmer, Torrs of Kelton.
Baillie, Thomas, dairyman, Cuil Dairy.
Campbell. Robt.. Jamieson, farmer, Cuil.
Bodle Andrew, ploughman, Cuil Cottages.
Anderson, George, ploughman. Cuil Cottages.
Cowan, James, ploughman, Corra Cottages.
Ireland, Robert, byreman, Corra Cottages.
Hutton, John, farmer, Corra.
Maxwell, Walter, ploughman. Caigton Cottages.
Gordon, Alexander. ploughman, Caigton Cottages.
Crawford, James, B., Farmer, Caigton.
Carson, John, foreman, Caigton Close.
M'Culloch, John, dairyman, Caigton Dairy.
Carson, William, shepherd, Caigton Hill
Kirkpatrick, John, farmer, Culinaw.
Haddow. Rev. Jas. Murray, minister, Buittle Manse.
Twiname, John, horse breaker, Kirkstyle.
Hughes, Mary Ann, Kirkstyle. Buittle.
Steel, Wm., farmer, Broomiebrae.
Higgins, Mrs Jane, crofter, Boghall 
Carruthers, William, roadman, Hardhills.
Anderson, Thomas, blacksmith, Raeburn Cottage, Hardhills.
M'Clune, James, joiner and cartwright, Hardhills.
Clark, Mrs Eliza, Hardhills. 
Marchbank, Archibald, farmer, Little Knox.
M'Whirter, John, ploughman, Wallyards.
Malcolmson, William, farmer, Allanbank.
MCutcheon, George, ploughman, Meikle Knox.
Smith, John, farmer, Meikle Knox. 
Tonner, Jane T., teacher, Schoolhouse, Buittle.
Boyd, W., farmer, Guffogland. 
M'Vinnie, David, farmer, East Logan
Gordon, Samuel, gamekeeper, Fordknowe.
Stewart, Thomas, surfaceman, Buittle Railway Cottages.
Craik, Ivie, surfaceman, Buittle Railway Cottages.
Sewell, John, surfaceman, Buittle Railway Cottages.
Johnstone, William, surfaceman, Buittle Railway Cottages.
Halliday, W., farmer, Milton. 
Porteous, Richard, farmer, West Logan.
Bell, J., ploughman, West Logan. 
MCormick, Agnes, West Logan Cottage.

HALKET LEATHES ROAD.

Ireland, Robert, gardener, Ernespie Lodge.
Ernespie House (Vacant). 
Buchannan, Alexander, labourer, North Lodge, Ernespie.
M'Lauchlan, James, shepherd, Ernespie Farm.
M'Lauchlan, J., surfaceman, Ernespie Cottage.
Kirk, Irving, chauffeur, Hillowton Lodge.
Gillespie, William, solicitor, Hillowton House. Tel. No. 14.
Belford, Robert, gardener, Hillowton.
M'Gill, David, farmer, Hillowton. 
Anderson, James, ploughman, Hillowton Cottage.
Austin, Joseph, farmer, Allanton. 
Bickett, James, farmer, Gerranton.
Edmunds, John, dairyman, Gerranton.
Houston, William, electrician, The Lodge, Mollance.
Barbour, Alex., farmer, Dunjarg. 
M'Morrine, Robert, ploughman, Dunjarg Cottages.
M'CLeary, William, shepherd, Dunjarg Cottages.
Howatson, Andrew, gardener, Corbieton Stables.
Biggar, William, Corbieton. 
Dinwoodie, James, farmer, Corbieton.
Wright, William, shepherd, Corbieton Cottage.
Doig, James, cotman, Milton Park.
Muir, Joseph W., farmer, Milton Park.
Middleton, John, shepherd, Scroggiehill Cottage.
Harbour, James, farmer, Scroggiehill.
M'Gaw, Robert, roadman, Hopehead.
Kerr, Samuel, ploughman, Blackerne Cottage.
Irving, Robert C., farmer, Blackerne.
Brown, James, herd, Cockleaths. 
Carruthers, W. J., farm servant, Halket Leathes Cottage.
Grierson, Edward, farmer, Halket Leathes.
Kelly, John, shepherd, Halket Leathes Mill.
Tait, George, surfaceman, Halket Leathes Smithy.
Smith, M., farmer, Leathes. 
Hope, James, ploughman, Leathes.
Bourne, George, cattleman, Leathes.
Rennie, Alexander, ploughman, Halket Leathes.
Lockhart, Robert, dairyman, Leathes.
Johnstone, William, Ernespie Low Lodge.

BUITTLE DELIVERY.

Scott, Barbara, farmer, Meikle Dalbeattie.
Little, Anthony, byreman, Meikle Dalbeattie Cottage.
M'Robert, William, farmer, Reedweel.
M'Adam, William, Craignair Cottage.
Kerr, Hugh, labourer, Craignair House.
Kirk, George, forester, Craignair Cottages.
Clark, John, ploughman, Craignair Cottages.
Dinwoodie, Wm., blacksmith, Gibraltar Cottage.
Craik, James, labourer, Buittle Mains Cottage.
Hutton, Samuel S., farmer, Buittle Mains.
Graham, John, farmer, Old Buittle.
Hunter, John, labourer, Auchengate Cottage.
Campbell, James, farmer, Barsyard.

PALNACKIE ROAD.

Barren, William, farmer, Butterhole.
Mitchell, James, Claycroft.
Little, Robert, farmer, Breckonie Hill Farm.
Davies, Win. J., oddman, Cottage, Breckonie Mill.
Maxwell, W. J. H., Munches.
Paterson, Mrs, Dairymaid, Munches Stables.
Hunter, John, Munches Stables.
M'Fauld, Andrew James, gardener, Munches Gardens.
Welsh, John, farm manager, Toull Farm.
Johnstone, Mrs. Annie Elizabeth, dairymaid, Kirkennan.
Hunter, Andrew, coachman, Kirkennan Stables.
Maxwell, Wellwood, Kirkennan. 
Whitelaw, James, gardener, Kirkennan Lodge.
Johnstone, John, wood forester, Kirkennan Cottage.
Campbell, David, labourer, Gardenburn, Buittle
Stewart, Charles, ploughman, Gardenburn.
Nasmith, J. W., Barlochan.
Irvine, John, gardener, "The Bungalow," Barlochan House.
Porter, George, farm manager, Barlochan Farm.
M'Clune, Alexander, smallholder, Cloneyards, Palnackie.
Hutton, James, farmer, Barchain.
Millar, Andrew, farmer, Clone. 
Wallace, Thomas, farmer, Courthill.
Blair, William, trapper, Courthill Cottage.
Jardine, William, ploughman, Broom Isle, Munches.
Swanston, George, gamekeeper, Colehole Cottage.
Hogg, George Muir, estate worker, Cooperknowe House.
Beattie, Wm., hedger, Cooperknowe.
Anderson, Miss B. C., Cooperknowe.
Stewart, William T., estate worker, Ramshaw.

PALNACKIE Sorting Office

Black, Mary, Glen Road.
Black, Thos. C., master mariner, Smyrna Cottage.
Brown, Mrs Elizabeth, Glen Road.
Brydson, Mrs Mary, Port Street. 
Campbell, Mrs Mary, Port Street. 
Carswell, Mrs Elizabeth, Dalbeattie Road.
Carswell, Samuel, grocer, Palnackie.
Corrie, Andrew, quarryman, Palnackie Village.
Cowan, James, woodcutter, Port Street.
Dalling, Miss Annie Ross, Port Street.
Fergusson, Samuel K., rabbit trapper.
Finnigan, Mrs H., Port Street. 
George, Mrs Georgina, Port Street.
Gordon, Margaret, Port Street. 
Greenway, A. J., master mariner, Urr Bank.
Halliday, Mrs Georgina, Sawmill Cottage.
Halliday, Messrs G., & Sons, timber merchants.
Halliday, George, wood merchant, Rambler Cottage.
Halliday, James Rae, timber merchant, Woodlea.
Halliday, William Crosby, engine driver, Glen Road.
Hawthorn, Robert, seaman, Dalbeattie Road.
Irving, Christopher, grocer. 
Irving, James, wood-carter, Glen Road.
Kerr, Thomas, sawyer, Port Street.
King, John J., stationer, Post Office. Tel. No. 1.
Kirk, Alexander, rabbit trapper, Port Street.
Kirk, Irving, rabbit catcher, Port Street.
Lawson, James, sawmiller, Rowan Cottage, Woodside.
M'Cartney, Jessie A., jam manufacturer, Yettan Terrace.
M'Cartney, Robert, quarryman, Cannon Place.
M'Knight, Joseph, woodcutter, Cannon Place.
M'Lellan, Mrs Jane, Dalbeattie Road.
M'Master, John, sailor, Glen Road.
M'Nae, John, retired, 2 Yettan Terrace.
Mein, John, Yettan Terrace. 
Neilson, John, harbour master, Yettan Cottage.
Neilson, Robert, motor driver, Yettan Terrace.
Niven, Mrs Helen, grocer, Port Street.
Niven, Thomas P., Port Street. 
Paterson, Mrs Ellen, Port Street.
Roberts, Hugh, sailor, Yettan Terrace.
Stewart, John, seaman, Dalbeattie Road.
Sturrock, John, publican, Gordon Arms. Port Street.
Thomson. Mrs A., nurse, Yettan Terrace.
Walker, Mrs John farm worker, Cannon Place.
Wilson, Caroline, Port Street.
Wilson, Mary, Port Street.
Wilson, Robert, labourer, Glen Road.
Wilson, Samuel, publican, Commercial Inn.

CHAPELCROFT DELIVERY.

M'Kee, Samuel, schoolmaster, Schoolhouse, Palnackie.
Cannon, James, farmer, Woodhead, Palnackie.
Thomson, James, farm manager, South Glen, Palnackie.
Thomson, John. smallholder, Lochhill, Palnackie.
Lacey, John F., estate labourer, Park House, Palnackie.
Rollo, A. W, forester, Redliggate, Palnackie.
Wilson, James, farmer, Orchardton Mains, Palnackie.
Turner, Robert, farmer, Holm of Almorness, Palnackie.
Turner, M. W., Nethertown Cottage, Palnackie.
M'Murray, Mrs S., Cocklehain, Palnackie.
Murray, William, gamekeeper, Orchardton Kennels, Palnackie.
M'Lachlan, Douglas, byreman, Chapelcroft Dairyhouse, Palnackie.
M'George, R., labourer, Chapelcroft.
Paton, Andrew, farmer, Chapelcroft, Palnackie.
Craig, David, farmer, Potterland, Palnackie.
Thomson, Robert, farmer, Glenyerrock, Palnackie.
Stevenson, J. B., farmer, Douganhill, Palnackie.
Kerr, John, ploughman, Old Douganhill, Palnackie.
Rae, John, farmer, Isle Farm, Palnackie.