[1] In 1861 he was appointed agent and manager of the Calcutta and South-Eastern Railway in India, holding that position for about seven years before he was compelled by ill-health to retire.
On 1 June 1895, following the expiry of their term, Pendleton was appointed sole Commissioner, assisted by an Advisory Board.
He was practising in Liverpool, England, when around 1875 he left for South Australia on account of his health, settling in Port Augusta, where he was appointed Medical Officer to the prison and police, and honorary surgeon to the hospital.
[15] Their only child, daughter Alaine Mary De Burgh Pendleton, married in England in 1894 Arthur Gayford.
[16] "I had the pleasure of working with the late Mr. Alan G. Pendleton, C.M.G.. during the whole period of his connection with these railways, and can safely say he had not only the sincere respect, but the warmest regard of every man in the service.
however, practically took over the control, and within a very short period completely reorganised the whole system of working, and I think I might say originated the methods now in operation.