Philip Billingsley Walker (1841 – 5 August 1903) was a senior public servant with the New South Wales Post and Telegraph Department.
They married at Eynsham, Oxfordshire, England on 22 December 1824 and had a large family there, Philip Billingsley Walker being the sixth son.
He rose rapidly in the service, by dint of sheer merit, and became secretary to the department during Colonel Cracknell's administration, when the telegraphs and post-offices were united under one permanent head.
The late chief was held in the highest esteem, not only by the officers and employees of the department, but by all branches of the public service, and by a large circle of friends.
[6] On 10 August 1899, the Postmaster-General, one or two officers of the Department and representatives of the press, were invited to a demonstration of wireless under the supervision of P. B. Walker, Engineer-in-Chief of Telegraphs.
Walker stated that he felt there was presently limited commercial application, but nevertheless advised that further experiments would be conducted, with sea trials still to be decided upon.