Picked this cover up today. Britain is not my area, but since it was crossing the pond to Upper Canada, thought I should give it a home
Lets see if I get the postal markings correct. Here goes.
First it sports an 1856 SC#27 - oddly trimmed of perfs on both sides.
This is tied to the cover with an black oval Chief Office cancel #16 (Chigwell). On the back is a blue London cancel dated July 31 1857. The blue ink indicated it was processed in the evening.
Besides the 6p paid with the stamp an additional 1p was due for insufficient postage and stamped in black also tying the stamp to the cover. This would be due on delivery.
The front also shows a black clipped diamond stamp dated August 1 from the Liverpool office, just above the notation 'per mail steamer'.
The red circle with cross indicates a foreign letter which was late due to being missorted.
The 2 1/2 stamp in black would indicate Canadian postage due. 6d per half ounce as of 1851.
Well, GB experts...how'd I do?*** Moved by Staff to a more appropriate forum. ***