Neighbour tells William Tyrrell inquest his memory has deteriorated amid 'inconsistencies' in his evidence

Kendall local Paul Savage has told the inquest into the disappearance of William Tyrrell his memory has deteriorated in the last five years.

The now 75-year-old has been questioned over the last few days about inconsistencies in his evidence. 

Today, he revealed for the first time he saw two unknown cars parked on the street two days before the three-year-old vanished.

Asked if he was absolutely sure, he emphatically answered, "yes".

Mr Savage did not mention the vehicles in two police statements, a lengthy interview and a walk-through recorded in the years after William vanished.

"I did tell somebody, it might have been the police, I can't remember," Mr Savage said.

The court heard yesterday there's a period of two hours or more that morning in which no one recalls seeing Mr Savage.

The elderly neighbour was emotional at points today as his barrister, Chris McGorey, asked him about the recent deaths of his wife from cancer and his brother.

"Fair to say that has knocked you around a little bit?" Mr McGorey asked.

"Yeah," Mr Savage replied.

"How do you say your memory rates at this point compared to five years ago?"

"Not real good," he said.

The inquest will return to Sydney next week to hear from washing machine repairman Bill Spedding.

The rest of the evidence will be heard in November.

Coroner Harriet Grahame has this week acknowledged the frustrating delays.