题目内容：
回答题：Scotland Yard's top fingerprint expert,Detective Chief Superintendent Gerald Lambourne had a request from the BritishMuseum's Prehistoric Department to focus his magnifying glass on a mystery."Somewhat outside my usual beat", he said．
This was not a question of Who Did It, butWho Was It. The blunt instruments he pored over were the antlers of red deer,dated by a radio-carbon examination as being up to 5,000 years olD．They wereused as mining picks by Neolithic man to hack flints and chalk, and thefingerprints he was looking for were of our remote ancestors who had lastwielded them.
The antlers were unearthed in July duringthe British Museum's five-year-long excavation at Grime's Graves, nearThetford, Norfolk, a 93-acre site containing more than 600 vertical shafts inthe chalk some 40 feet deep. From artifacts found in many parts of Britain itis evident that flint was extensively used by Neolithic man as he slowlylearned how to farm land in the period from 3,000 to 1,500 B．C．
Flint was especially used for axe heads toclear forests for agriculture, and the quality of the flint on the Norfolk sitesuggests that the miners there were kept busy with many orders.
What excited Mr. G. de G. Sieveking, themuseum's deputy director of the excavations, was the dried mud still stickingto some of them. "Our deduction is that the miners coated the base of theantlers with mud so that they could get a better grip," he says. "Theexciting possibility was that fingerprints left in this mud might at lastidentify as individuals a people who have left few relics, who could not reador write, but who may have had much more intelligence than has been supposed inthe past."
Chief Superintendent Lambourne, who fouryears ago had "assisted" the British Museum by taking the fingerprintsof a 4,000-year-old Egyptian mummy, spent two hours last week examining about50 antlers. On some he found minute marks indicating a human grip in themuD．Then on one he found the full imprint of the "ridge structure"of a human hand--that part of the hand just below the fingers where mostpressure would be brought to bear in wielding a pick.
Chief Superintendent Lambourne has agreedto visit the Norfolk site during further excavations next summer, when it ishoped that further hand-marked antlers will come to light. But he is cautiousabout the historic significance of his findings.
"Fingerprints and handprints areunique to each individual but they can tell us nothing about the age, physical characteristics,even sex of the person who left them," he says. "Even the fingerprints of a gorillacould bemistakenfor those of a man. But if a number of imprinted antlers are recovered fromgiven shafts on this site I could at least determine which antlers were handledby the same man, and from there might be deduced the number of miners employedin a team. "
"As an indication of intelligence Imight determine which way up the miners held the antlers and how they wieldedthem."
To Mr. Sieveking and his museum colleaguesany such findings will be added to their dossier of what might appear to thelayman as trivial and unrelated facts but from which might emerge one day animpressive new image of our remote ancestors.
Mr.Lamboume is said to have regarded the examination of the antlers as a task ________. A．requiring a different technique from the one in which he was qualified
B．different in nature from routine investigations
C．moredifficult than his usual duties
D．forcing him to leave his usual headquarters
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