According to this Article, it appears there were two texts!:Did William Tyrrell disappear earlier than reported? Why CCTV could prove crucial | Daily Mail Online
Confirmed time RD left ktc 9:43am
RD saw mfc in his yard calling out for W around 10:45am
Mfc text to SD was at 10:35.
Mfc home by 10:40 latest n calling out for W immediately
RD lived less than 300mtrs away from gm house and could hear mfc calling out
The vital minutes which could answer what REALLY happened to William
“Police estimated William vanished between 10.05am and 10.20am.
About 10.30am, William's foster father texted his wife to say he was returning home after buying newspapers nearby.
The foster mother said she saw the text after she had started looking for William.”
NOTE: This Article continues to say that there was ANOTHER TEXT!:
BMM “Another text from her husband told her he would be 'home in five' and she said she ran outside to see if he had William with him.”
At 10.57am, shortly after the pair began looking again, the foster mother called police and said they had been looking for him for '15 or 20 minutes'.