The only cash contribution made by Mr Charles Haughey towards the medical expenses of the late Brian Lenihan was £200 his driver delivered to Mr Lenihan's home in 1989, the tribunal heard.
Mr Lenihan's widow, Ann, told the tribunal the cash was given to her in an envelope on the day she and her husband departed to the United States for an operation at the Mayo Clinic.
Counsel for the tribunal, Mr John Coughlan SC, asked: "Can we take it if there was any other sort of cash around the place you would have known about it?"
"Yes, in as much as I could say," replied Ms Lenihan.
Taking Ms Lenihan through her statement to the tribunal, Mr Coughlan said Mr Haughey's driver "handed you an envelope which he indicated to you was from Mr Haughey".
Mr Coughlan said Ms Lenihan did not open it immediately, but when she did she "found that it contained the sum of approximately £200.
"And I think at the time, bearing in mind the many strains that you were under, you considered this a generous gesture on the part of the then Taoiseach, Mr Haughey," said Mr Coughlan.
Ms Lenihan said she did.
Mr Coughlan added: "You have also informed the tribunal that you were satisfied that your late husband did not receive any cash payments from Mr Haughey or any source on his behalf at the time, prior or subsequent to your husband coming back from the Mayo Clinic."
He added: "You were with your late husband constantly during the period and you would have known if any such payments had been received.
"I think it is correct that you actually travelled to the United States with your husband, and you were there all of the time and you were there with him when he came back," said Mr Coughlan.
Mr Coughlan said Ms Lenihan had told the tribunal she was not aware of any discussion between Mr Haughey and her late husband in 1990 that the expenditure incurred on the operation exceeded the donations received.
"I think your late husband was aware that there had been donations received. Isn't that correct?" asked Mr Coughlan.
"Yes, that's correct," Ms Lenihan replied.
"No member of your family is aware of such discussions, isn't that correct?" said Mr Coughlan. Ms Lenihan said that was true.
"You have informed the tribunal that you are satisfied that were such a conversation to have taken place your husband would have discussed it with you as you shared with him the management of your personal finances," said Mr Coughlan.
Mr Coughlan asked Ms Lenihan to comment on previous evidence given by the former Fianna Fail fund-raiser, Mr Paul Kavanagh.
"You have informed the tribunal that you were not aware of whether Mr Paul Kavanagh met your late husband soon after his return from the Mayo Clinic in July 1989.
"I take it that you never heard from your late husband about that at the time," he asked.
Ms Lenihan said she did not remember Mr Kavanagh being mentioned at the time.
She was then asked about a list of donors which Mr Kavanagh said was prepared at the time.
"You are not aware of any list of persons given by Mr Kavanagh to your late husband?"
"No," said Ms Lenihan.
Mr Coughlan said Ms Lenihan had "made a complete search of your house to see if any list can be found and you have found none".
Mr Coughlan asked: "Your husband, did he ever inform you that Mr Kavanagh had a list or had given him a list?"
"No," replied Ms Lenihan.
Mr Coughlan said: "You were aware that the then Taoiseach, Mr Haughey, and the late Mr Peter Hanley were involved in organising the raising of funds to defray the costs of your late husband's medical expenses." Ms Lenihan said she was.
"And was it from your late husband you heard that?" asked Mr Coughlan. "Yes," Ms Lenihan replied. When asked if Mr Lenihan ever mentioned Mr Kavanagh's name, Ms Lenihan said: "No."