A World War II bomb which led to the birth of chemotherapy
Harriet Wheelock

A World War II bomb which led to the birth of chemotherapy

Yesterday, Senator John Crown, Consultant Oncologist at St Vincent’s Hospital, donated a World War II bomb fragment to the Heritage Centre. The fragment had been given to him by a former patient, Dermot ‘Derry’ Clarke, and has a surprising connection to medical innovation.

Derry Clarke was born in Dublin in 1922. He was educated by the Christian Brothers, and subsequently went on to study the new field of electrical engineering in Kevin St College. Despite his father’s request that he seek out secure work at home in Ireland, Derry enlisted for the British Merchant Navy in 1942 and found himself working in one of the most professions of the time. Merchant seamen serving in the convoys suffered a horrendous casualty rate of one in four, seven times higher than that of the Allied armed services.


On the night of 2 December 1943, Germany launched a devastating air attack on the Italian port of Bari, sinking or damaging 40 ships. One of these, the US ship SS John Harvey, was carrying a secret cargo of mustard gas shells. Derry Clarke was aboard the supply ship, SS Director which was berthed in Bari Harbour, next to the fated vessel. A last minute move to a different part of the harbour saved the lives of Derry and his shipmates as the bombs rained down.

As a result of the attack many military personnel and civilians suffered from the effects of gas exposure, caused by the explosion of the mustard gas shells. Lieutenant Colonel Stewart Francis Alexander was dispatched to Bari and after conducting a series of tests discovered that the chemicals in the mustard gas killed white blood cells, prompting Alexander to wonder if chemicals would be useful in killing cancer cells. Based on his work, two Yale pharmacologists were hired by the military to study the use of mustard gas chemicals and developed the first chemotherapy drug, mechlorethamine to treat lymphoma.

Prof Frank Murray, Mr Kevin Clarke (son of Derry) and Senator John Crown
 “Derry was, during his long life, the Aer Lingus Director of Operations, an athlete, a merchant seaman, flew in the airlift which broke the Berlin blockade, a patient of mine, and above all else, was a gentleman,” said Senator Crown.
“I had heard of the Dr Alexander’s report on the Bari bombing, it was part of the folklore of an oncology education, so when Derry told me of his experience I immediately recognised the historical significance.
“It was amazing for me to reach out and touch a part of oncological history, really the birth of chemotherapy. To have the story told by so charming a man as Derry was a privilege.
“A thousand civilians died on that night in 1943 because of the mustard gas that the Allies had shipped to Italy. With Derry’s passing, their story became a little more obscure. I hope that with this donation, both the memory of Derry, and the people who did not survive the Bari bombing, will be honoured and remembered.
“The fragment is a representation of something good arising from evil, as the mustard gas chemicals eventually lead to the first chemotherapy drug for the treatment of cancer.

Prof Frank Murray, President of the Royal College of Physicians of Ireland said the donation of the bomb fragment is a very welcome and important addition to the RCPI Heritage Centre.
“The RCPI Heritage Centre is an integral part of our history and we are delighted to receive this donation.
“Derry Clarke was a participant in one of the biggest naval bombings of WWII, out of which arose the beginnings of cancer chemotherapy. His family has been very generous and the College appreciates and recognizes this.”