a memo, which stated that £500 had been allocated by Smiths for the development and that Brown was able to spend half a day per week working with Donald. The new B-mode scanner was also known as the bed-table scanner, and it was built out of an amalgamation of medical and industrial parts. Brown managed to scrounge an older Mark IV flaw detector in Glasgow along with a six-inch electrostatically-deflected cathode-ray tube taken from the company stores in Glasgow. From the company's Barkingside R&D department, Brown found an experimental weld-testing machine. Both these machines were dismantled for parts. To measure the position of the transducer, Brown selected an "X-Y" orthogonal measuring frame system: it was measured in place by a sine/cosine potentiometer that was used to calculate the position of the transducer from the angle of its rotations. However, it was an expensive piece of equipment that cost more than their £500 budget; Brown managed to find a damaged component and repaired it. The machine was built on top an old hospital bed and made extensive use of Meccano chains and sprockets. By late 1957, the first contact B-mode scanner was constructed and in clinical use by that year. The A-mode scanner was moved to the Royal Maternity Hospital at Rottenrow where James Willocks, who joined the team in 1958, and Tom Duggan, a physicist hired by Donald in 1959, began to investigate fetal development with the instrument. The initial test of the device was an ultrasound of MacVicar's abdomen. In the same year, Donald started to experiment with taking images of pregnancy, and discovered that their original theories about ascites were correct. In a landmark paper on 7 June 1958 published by Donald, McVicar and Brown discussed the development of the A-mode scanner and decisions that led to the B-mode scanner. Donald and McVicar also described the first successful diagnosis using obstetric ultrasound with the B-mode machine, which occurred when a woman patient was diagnosed with terminal cancer of the stomach using traditional clinical methods, palpation and by X-ray. Donald diagnosed the woman with an ovarian cyst and when the woman was sent for a Laparotomy, a large cyst was discovered and removed. The paper highlighted the importance of the instant feedback that was available from the operating room to improve the quality of the image. Also described in the paper was a description of testing of ultrasound on