Other Sources

Murder solved, The Daily Mail, 2007. 

It all fits. No holes, except perhaps arranging for the pick-up time by Dr. Athan Philip. Supposedly Dr Philip was told some time in advance to pick up Broughton at a pre-arranged location at a very specific time, when in fact timing depended on events completely out of his control.Would have required a telephone. Were telephones in Kenya at the time:

In Kenya, the first telephone network was connected in 1908 with 18 subscribers in Nairobi and Mombasa. During the colonial period, the telephone remained the preserve of the settler community and their businesses. ... Previously, ordinary Kenyans had to rely on letters and telegrams as a means of communication.

In White Mischief, it is much more likely Jock rode a horse (Pantaloon) back to the house. He simply had to tie the horse in the nearby meadow; no one would notice. There would have been no need to know beforehand exact time he would shoot Erroll.

LA Times, September 20, 1987, "Last Clue to 1941 Kenya murder dies with aristocrat

Lady Diana Delamere took with her to the grave any secrets she possessed about the unsolved murder of her aristocratic lover, an English earl whose death scandalized colonial Kenya 46 years ago.

“With her death, history has been robbed of the last witness to the events surrounding the murder of her lover, Lord Erroll,” author James Fox wrote in London’s Daily Telegraph newspaper.

Lady Diana was 76 when she died of a stroke Sept. 3 in Ascot, England.
She was buried in the shade of a fig tree in a small cemetery she built at Soysambu Ranch, about 100 miles northwest of Nairobi.

Born Diana Caldwell, she was married to the man accused of the murder and was the last person who acknowledged seeing Erroll alive. She did not testify at the trial of her husband, Sir Jock Delves Broughton, who was acquitted for lack of evidence.

Seven intriguing theories on who killed Lord Erroll, Owaahh.

Lucinda Riley, great, great photos and map.

John Hurt, the movie, 1988.

James Sherwood, diary.

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From A Reader

Karen Blixen's Overlap With Happy Valley

Karen was back in Denmark by 1931 - 10 years before the murder.

However - there was some overlap.  Remember that photo (ha!) showing Bror's next wife along with the Happy Valley crowd?

Anyway - Karen and Bror married in Mombasa in 1914.  Lord Delamere had bought Soysambu in 1906 (and he'd been in Africa for years before that).  He didn't marry Gwladys until 1928.  So, Lord D was there before Blixens.

Alice de Janze and hubby spent 1925 and 1926 hunting lion.  Her affair with the E of E occurred then while he was still married to Idina.  Alice didn't shoot her hubby until 1927.

Idina didn't move to Kenya until 1924 - and by that time Karen and Bror were on the rocks- but nonetheless, there was definitely was overlap.

Karen and Bror were divorced by 1925, but she didn't leave until 1931.  Out of Africa was published in 1937, 4 years before the murder.

Karen was treated for syphilis.  Wedding present from Bror?