Tribute:
 
Nigel was born in Tiverton in Devon in 1931, to George and Helen Nicholson.  He went to school in Wiltshire, where he developed a strong interest in snails; one that he would return to with enthusiasm in his retirement.
 
Following in his father's footsteps, he qualified as a doctor in 1956 and then spent his National Service in Nigeria as a medical officer in the Nigeria Regiment. During this time he met Rachel. Rachel's mother later said  "I knew they were right for each other when I saw them in the library, leaning over a book together, examining a beetle."  They were married the next year and in 1961 moved to Tanzania.
 
Initially he was employed by the Colonial Office and then by the Tanzanian Government. Four children and a higher medical qualification later, he became a specialist physician, and was able to concentrate on the type of work he preferred.
 
Working conditions in Tanzania were very difficult. One day he came home and said  "Today I had to search in several wards just for a thermometer." There were frequent water, electricity and drugs shortages. However, he persevered with immense dedication, working seven days a week.
 
Indeed, Christmas day is remembered clearly by his children as there was a prescribed sequence of events before they were allowed to open their presents:  "get up, have breakfast, do the washing up, brush teeth and finally - wait for daddy to come home from the Hospital" - this could be some time!
 
Nigel was very well known and respected in Tanzania for his hard work and integrity -  particularly in the south of the country, where he spent most of the 22 years that he was there. This was largely due to his dedication in treating and caring for patients. He also made the welfare of prisoners a priority. Conditions in African prisons were appalling, with people being locked up for years on remand before being tried. He often spent time trying to get the sick remand prisoners released. Nigel had always wanted to work in Africa, saying the reason was that he wanted to help others and change things for the better. He certainly did this for very many people.
 
In 1976 his hospital was upgraded to consultant status, funded by the British Government. Nigel then worked with a team of British Consultants, providing valuable local knowledge, as they settled in. During this time he was also involved in the training of Medical Assistants. He wrote a book for their use about non-communicable diseases, which is still in demand.
 
In 1983 the family left Tanzania and Nigel and Rachel went back to Nigeria to work, settling in a mission cum government hospital in the hot and humid south east of the country,  near where they had first met. Again this brought difficult working conditions which he bore with his usual patience.
 

Retirement in 1991 brought some problems changing from one continent to another, and from a demanding more-than-fulltime job to pottering around. However he soon found occupation - digging a wildlife pond, being a steward at Rudyard Kipling's house and working towards a Field Biology Certificate at Sussex University. He enjoyed being a church warden at this church, and taking part in University of the Third Age activities.  He was also teaching himself Ancient Greek, learning about the history of houses, and recently was studying for the Bishop's Certificate. In fact, Nigel was interested in virtually everything. Whenever someone in the family wanted to find something out, they would say "ask Daddy". If he didn't know, his response was "Lets look it up". He loved finding things out and had a tremendous memory for facts about churches, railways, snails, history and wildlife in general.
 
Natural History was his first love, but although he enjoyed the game parks of Tanzania, he always said that the mini wildlife around the garden was just as interesting. He made it his business to educate all and sundry about interesting things, especially slugs and snails.
 
He was a very modest person and played down his achievements, so his family were very proud when he was nominated a Fellow of the Royal College of Physicians of Edinburgh in 1994.
 
Nigel was fairly reserved but would quietly take things in and remember them years later. One story which recently amused us concerned an early experience in Tanzania. He received a telegram asking him to investigate sleeping sickness in Lake Manyara National Park. He duly went off on safari to investigate. On submitting the report, he received another telegram, thanking him, but pointing out that the first telegram shouldn't have read sleeping sickness, but sleeping accommodation!
 
On a personal note, I have only fairly recently met Nigel and felt I was beginning to know and like him very much.
 
Two things stand out in my mind: He had a wonderful sense of humour - from his capacious memory he would pull out quotes and anecdotes to amuse and inform.
 
He also had a great care for the world and the people of this world.