This was revealed by Richard Westwood-Brookes, a historical documents expert at Mullock's, a specialist auction house in Church Stretton, Shropshire.
"This was quite an astounding result," commented Westwood-Brookes
"The key to our success is that we are specialists in what we do - be it historical documents, sporting memorabilia, fishing tackle, toys or militaria.
Our experts know their subjects and can deal professionally with material which is consigned."
Auctions are remarkably cagey about revealing the identities of buyers but Westwood-Brookes
told The Telegraph the buyer came from overseas and was of "Indian origin" - so there is an outside chance the letter may be gifted for public display in India.
There is also the possibility that the high price will encourage other "freedom fighters" or their families to rummage through rusty old trunks or almirahs to check if there is anything that can be salvaged and sold in the West.
"I have already had two or three people ringing me up from India," he
made an offer which prospective sellers in India and elsewhere may find hard to resist: "Vendors can come to Mullock's
for all of our sales and be confident that in our highly motivated team we can achieve prices which are often much higher than the London rooms."
Last year Mullock's
sold a collection of Gandhi material, including his
glasses and prayer book.
The collection went for a total £138,000, with letters fetching £4,000-£6,000 each.
As to why the latest letter went for £134,000, the explanation from Westwood-Brookes
was: "There is a golden rule in auctions - if two people are prepared to buy something they outbid each other."
Adding his personal comments with extracts from the letter, Westwood-Brookes
says that "Gandhi
makes a typically reasoned plea for his own and his followers' release from house arrest".
There is further interpretation from Westwood-Brookes
knew that there were two clear cut factions in the Congress - the first believed in non-violence as was Gandhi's
philosophy while the second believed in armed struggle.