I've just dug it out & read the relevant page (I just looked at Pamalam before), and, yes, Kate does say that Gerry received a call of support from GB seconds before they arrived at the Fatima shrine, so 10.28 fits. Somehow I doubt that GB would ring again that day. It was CM's first full day - maybe he had been busy setting up contacts, maybe some were calls from the British Ambassador re. meeting the following day.
Ah but if you had read KM's full account Misty you would know he did also phone GM a second time that day, and it was in the afternoon. IMO this second call was probably at 14:59 (again 14 minutes long). So that's possibly two 14 minute calls in one day?
Look at the first phone talk with Obama - during which were discussed
(a) the joint efforts to confront the global economic crisis,
(b) the situation in Gaza,
(c) the urgent need to make Afghanistan a priority.
That call was about 15 minutes long