One Pound GBP in 1853 had the purchasing power of about S114.35 CAD today.
NOTE - This historical conversion is the result of many calculations and considerations for which I cannot take credit. The resulting answer should only be regarded as an approximation.
The first British One Pound note was issued in 1914.
There was no 1850 British Penny minted.
25 euro
One Pound British in 1860 had the purchasing power of about £63.10 GBP in 2010. This is an approximation based on the value of the pound in 1860 and the value of the pound in 2010, factoring for inflation.
The British have never issued a "quarter" coin.
A British Pound in 1799 had the purchasing power of about £62.87 GBP today.
The face value of anything is whatever is written on it. The face value of a Pound, is a Pound. If you want to find out what the current exchange rate in US Dollars is for a British Pound, see the link below.
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The Pound did not exist as a unit of currency in 1469.
There was no 1811 British Sovereign or One Pound coin minted.
The Shilling has always been 1/20th of a British Pound.
It was worth one pound.
There was no British 1901 Two Pound or Double Sovereign coin produced.