He was sending a message to the Pope, who recieved it "5X5", and excommunicated the Bruce until 1322. Oddly enough, the execution of Jaques De Molay, grandmaster of the Templers, and the battle of Bannockburn happened the same day in 1314, (June 24-26).
Quite a bit is unclear about that time. The English (spit!) fled the field when a supposed force of "camp follower" formed their own regiment, and entered the battle for the Scots. i find this hard to believe, seeing as how the English (spit!) outnumbered the Scots 5:1. On the other hand, a division of Knights Templers, easily recognisable in full battle regelia, with their long beards would have struck terror into the English (spit!), since they were a battle hardened, formidable fighting force, with decades of experience.
Then there is the matter of all those unexplained Templer Gravestones around Mull and Killmartin dating from the 14th Century that the residents of the area either deny exist, or simply will not discuss.
"things that make you go Hmmmm..."