tim_s,

I think some were relined to varmint rounds like the .22 Hornet, both in this country and in England.  Classic Arms and Militaria, an English gun magazine, has had several articles on these rook rifles, with only one picture of a miniature Farquharson in a slew of break-actions and small Martinis.  (You do have a rarity; congratulations, and I can't find a green-with-envy smiley face to illustrate.)

Both CA&M's articles and one or two in the Gun Digest and other mags in this country in recent years deplore the ruination of the original calibers by relining or rebarreling.  According to one article I read, many of the converted rifles were redone in England not because somebody wanted a more modern chambering, but because Eley stopped making a lot of the peculiar cartridges for which these rifles were originally chambered.  When this happened, the local police authority might declare that the owner couldn't cite a use anymore, and refuse to renew the owner's license to possess the rifle.  Illustrating this was a nice Westley-Richards break action which had been bored out to a .410 shotgun.  (*Shudder!!*)

You must mean Wal Winfers series The Britsh Single Shot Rifle. Some great stuff in those books.

Cringe--- rebore or reline them when the barrels are perfectly good!!  Half the fun of them is figuring out how to make ammunition for them and shooting them.  How many good .310 Cadets have been rechambered to 32/20 and still won't shot. Learn the secrets and make them shoot.  Your education about these old guns and calibers will be greatly expanded.  To many of us realy don't know what a heeled bullet is or how rifling other than Enfield works.  So much history to be revisited.

Tim,
FWIW - in its day the .310 was not considered a rook and rabbit round - it was too powerful for that.  In actual fact, it was even used for hunting the smaller deer species - and if W. W. Greener is to be believed, it was useful as such out to 200 yds...  Don't underestimate the .310, it is a very versatile  and nice cartridge, which apparently was also very popular with taxidermists, as it did very little apparent damage.  It was also a popular target cartridge in its day
In fact, each and every year at Bisley, UK, you can shoot .310's at 200 yds (mostly the BSA .310 cadet). and looking at the scores, some .310 shooters can give some serious competition to the fullbore military rifle shooters...   
You could consider is as a heavy-bullet .32-20, with a 120gr bullet at about 1250 fps.  Definitely not for rats or pest control...    A.310 Farquharson would definitely be quite a desireable item indeed!  Not too many of those around.

I too own an exceedingly rare small action Gibbs farky. My action is too small for any of the large bore rounds, yet just a bit bigger than a rook. In its present configuration it has a 22" .303 lite wieght sporter barrel, and wieghs 6& 1/2 lbs. Mine is a best grade gun, with much use in the field and little original condition left. The scroll engraving on this gun is incredibly fine and absolutely superb. I have heard my gun reffered to as a baby farquaharson. My action is now on at least its 3rd barrel and I can only imagine the things this lovely old gal has seen. How wide is your action? Mine is about 1.330" across, and measures and is about 2.4" high from the top of the ring to the bottom of the action and about 2.2" wide. I really would love to know what caliber this gun was originally chambered for. Any how....there is at least one more small action farky out there. heres a picture of her here....sorry it just so happens to be on my rates page, that was not intentional.  (You need to Login or Register to view media files and links);  
                           Steve

Hey Bouldersmith;
  Sorry I missed your post. Welcome to the forum. I can attest the Farky's you have are something to lust over. Great projects. Kind of makes my Remington  Roller projects look pale in comparison. I will try to stop in for a visit some time this week. Maybe I might also get bit by the British Bug?

Steve, great gun. I do not believe that your's is a 'miniature". My action is probably 1/3 smaller. To get an idea "Google" Guns Digest 2001. Mine is ,in fact that cover gun, It will give you an idea as to size. If it were not for the fact that the grip was stretched out when stocked, you'd think it was a kid's gun- almost 1/2 size. This thing is really little. I have been told all of the minis have the same type of safty which is on the right side of the action and swings through about a 25-30 degree arc.