Lorraine, No, James Nowlan did not die at Gandamak. He was taken prisoner and taken to Cabul, where he was released on 21st September 1842. He is mentioned in the "Historical Record of the 44th", by Thomas Carter, page 132 in the second edition (1887) and page 158 in the first edition (1864). The first edition is on Google Books. The same information is in the Asiatic Journal (just Google "Nowlan, 44th"). You could contact the Essex Regiment Museum to see whether they have any further details on him - they have various indexes. I have the details of how to contact the Museum - please contact me off-List if I can help in that way.