1899, 1sh Pale Blue,
Pigeongram, Fourth Issue. Tied by well-struck violet "The `Original'
Great Barrier Pigeongram Service Sep. 15, 1899" circular datestamp and
"Copyright" (Ty. 4a) handstamp on 205 x 80mm flimsy to Inspector Ferguson,
Auckland, message reads "How are your canaries doing? Wish you good luck
with them this season. J. Thompson, Barrier", flimsy with usual light
toned areas, still Extremely Fine, illustrated in Walker (p.77) as the
example of this cancel (Image) 
1899, 1sh Pale Blue,
Pigeongram, Fourth Issue. Tied by lightly struck violet "The `Original'
Great Barrier Pigeongram Service 26 Dec. 1903" (Ty. 5) oval datestamp on
220 x 285mm flimsy datelined "Whangaparapara, Great Barrier Island, 4 PM
December 26th, 1903", with original stampless cover with Service
imprint at top used to deliver pigeongram once received in Auckland, cover
with faults, pigeongram with creases, otherwise Very Fine (Image) 
1899, 1sh Pale Blue,
Pigeongram, Fourth Issue. Tied by violet "The Original Great Barrier
Pigeongram Service Marotiri Syndicate Pigeongram Service" (Ty. 7)
three-line cancel on 225 x 300mm flimsy with clear strike of Ty. 3 cancel,
three-line hs (Walker Form No. 5, Bofarull cancel No. S.7.), boxed
pictorial hs of the Service's first issue and boxed "11 Oct. 1905"
cancel of the competing Pigeongram Agency, contents read "Just a
line by pigeonpost while in New Zealand. This is the only post of its kind
in the world and therefore most interesting."EXTREMELY FINE. AN OUTSTANDING USAGE OF THE PIGEONGRAM SERVICE FOURTH ISSUE.
This is a very late Great Barrier pigeon post usage. (Image)
1899, 1sh Pale Blue,
Pigeongram, Fourth Issue. Tied by violet "The `Original' Great Barrier
Pigeongram Service" (Ty. 3) circular datestamp on 220 x 158mm flimsy with
second strike at right and three-line hs (Walker Form No. 5, Bofarull
cancel No. S.7.) datelined "Whangaparapara Feb. 24th,'05" flimsy
with light toningFINE. A LATE USAGE OF THE PIGEONGRAM SERVICE FOURTH ISSUE.
Very few dispatches with stamps exist after 1904 (Image)
1899, 1sh Pale Blue,
Pigeongram, Fourth Issue. Violet "The `Original' Great Barrier
Pigeongram Service" (Ty. 6) oval datestamps on 220 x 131mm printed flimsy
(Form No. 4) datelined "15th Dec. 1900" from Auckland to Blind
Bay (Okupu), sender asks Constable Johnston to come with William Smith
to the mainland to serve as witnesses on his behalf, stamp with small
faults, otherwise Very Fine (Image) 
1899, 1sh Pale Blue,
Pigeongram, Fourth Issue. Tied by light violet "The `Original' Great
Barrier Pigeongram Service 23 Sep. 1900" (Ty. 6) oval datestamp on 220 x
165mm printed flimsy (Form 2) from Oroville to Auckland, flimsy with tiny
ink stain at top left, otherwise Very Fine
(Image) 
1899, 1sh Pale Blue,
Pigeongram, Fourth Issue. Uncanceled on 230 x 150mm flimsy to which it
does not belong, datelined "Port Fitzroy 10.2.1906" to Mt. Eden,
with original cover with Service Ty. 3 cancel in black and two strikes of
two-line hs. on back, cover exploded for display and with large tear thru
Ty. 3 cancel, flimsy with light toned spots, otherwise Fine (Image)
1899, 1sh Pale Blue, Marotiri
Pigeongram Overprint. With sheet margin at left, Stereo 6, original
gum, small h.r., pencil note on gum and small violet "P.J. Field" backstamp
do not show thru, Fine (Image) 
1899, 1sh Pale Blue, Marotiri
Pigeongram Overprint. Original gum, lightly hinged, barest trace of
usual gum toning at top, otherwise Fine
(Image) 
1899, 1sh Pale Blue, Marotiri
Pigeongram Overprint. Stereo 5, small part original gum, rich color,
well-centered on bright white paper, tiny natural inclusion, Extremely Fine
(Image) 
1899, 1sh Pale Blue, Marotiri
Pigeongram Overprint. Original gum, small gum toned spots at edges and
small diagonal crease at top right, Fine
(Image)