Mark Blackburn (numismatist) Mark Blackburn (numismatist) Mark Alistair Sinclair Blackburn, (5 January 1953 – 1 September 2011) was a British numismatist and economic historian. He was Keeper of Coins and Medals at Fitzwilliam Museum from 1991 to 2011, Reader in Numismatics and Monetary History at the University of Cambridge from 2004 to 2011, and a Fellow of Gonville and Caius College, Cambridge from 2005. He was the President of the British Numismatic Society between 2004 and 2008. In 1983, Blackburn was elected a Fellow of the Society of Antiquaries of London (FSA). In 1989, he was elected a Fellow of the Royal Historical
Collect call calls to be made back to fixed land lines in the United Kingdom. It is accessed by dialing the relevant international call prefix, followed by the number 800 REVERSE (i.e. 800 7383773). Collect call A collect call in Canada, Pakistan, and the United States, known as a reverse charge call in other parts of the English-speaking world, is a telephone call in which the calling party wants to place a call at the called party's expense. In the past, collect calls were only possible as an operator-assisted call, but with the introduction of computer-based telephone dialing equipment, it is now