Do but My Lot would have been working class fodder (they probably ate the rest of the letter). ?
Thanks
lol

(perhaps they were just hungry)
I think you may be doing them a big injustice.
There is working class and working class - what is working class anyway? I think very few people were considered real "middle Class" in the olden days.
I can only go by family, coalminers, tinsmiths, farmers, school teachers , inn keepers, mariners, ag labs and so on.
There is a high literacy rate in my own so-called working class in the 19th century (I'm not going just off signatures on marriage certs,)
I'll take a few of my family. I have found that if the mother can read and write, it's more likely that the children are literate too. It is the mothers that usually have the most influence on the young children growing up in their early years.
My own grandfather ( who was born in the early 20th century) couldn't read or write until he joined the army( the army taught him) .My g grandmother ( His mother) was illiterate, but his father was literate so were both his parents... But it was his illiterate mum that brought him up (father off in the army most of the time) hence resulting in his poor literacy ( even though he attended school)
My gg grandfather on my paternal side ( who was just an ag lab -good old working class

, born 1822) was literate, but I think this is because his literate mother brought him up ( his father died at a young age) - His mum was a school teacher who was illegitimate. Her mother was an unmarried teenage mother ( she was brought up by her grandparents, who were just working class plasterers).
My coalminers, my granddad on my other side, his parents were both literate ( born in the 1800's - they were just your common coalminers, my gg grandfather - literate. Before that the family were farmers-and literate as far as I can tell.
My grandmothers parents , her father who was a farmer was illiterate ( born 1853), her mother ( born 1876) , she was very well educated- she had absolutely beautiful handwriting - Her father was a farmer and he was illiterate ( born early 1800's), but her mother ( born 1840's ) - who also came from a farming family was literate.
I have a high illiteracy rate with my men folk on my grandmothers maternal line, but a very high literacy rate with their wives.
I would think that it would be very hard to get an accurate literacy rate in Britain in the 1800's, some folk could sign their name easily enough , but could not read or write. I would think that it would be false figures going off signatures on marriage certs.
I thought I'd point out that just because your family are
"working class" it doesn't mean that they are illiterate - God forbid if that were the case then all of mine would have been illiterate, which I know isn't the case. By just Glancing over my tree and with a guestimate ( without going through them all), I 'd say in-between 65 to 80% of my working class lot were literate in the 1800's , depending on which decade in the 1800's
Kind Regards
http://en.wikipedia.org/wiki/LiteracyPs The graph on the above article is for France, but I would think that there would not be much of a major difference between the two countries.