GLASGOW faces losing another valuable art collection in the wake of the council's successful bid to overturn Sir William Burrell's will.

The Maxwell Macdonald family which donated Pollok Park to Glasgow in 1967 to provide the rural setting for the museum that houses the Burrell Collection said yesterday that it was considering taking back a collection of paintings and furniture it has loaned to the city.

It is a further humiliation to the city council which has already seen two major donors turning their backs on the council after the Burrell ruling.

In a letter to Scottish Secretary Donald Dewar, who has until November 19 to reconsider the parliamentary commissioners' decision to allow the city to flout the will, Mr Donald Maxwell Macdonald says: ''It was with great dismay that my wife and I heard of the parliamentary commissioners' decision on the question of overturning Sir William Burrell's will. It cannot be right for the city of Glasgow to have spent so much time and money to achieve a victory which will make every potential donor think long and hard before committing a gift.

''My mother gave the Stirling Maxwell Collection to the city and we have a number of paintings on loan to it. The decision of the parliamentary commission has prompted us to review our position and consider whether we should withdraw the loan items.

''We sincerely hope that you can do something to overturn this extremely short-sighted decision.''

Last night Mrs Margo Maxwell Macdonald said at her home in Chelsea that the loan comprised ''17 good paintings, mostly Spanish'' and other small items including furniture. She and her husband would not comment further but will wait and see how matters develop.

Two weeks ago, the Earl of Crawford and Balcarres revealed he had asked the city to return a collection of costumes which his family had loaned to Glasgow and which is housed in the Burrell.

Lord Crawford said he had been partially prompted by the

city's move to break the will. Mr Henry Kelly, the president of the Scottish Pottery Society, said he had intended leaving his collection of pottery and paintings to the city. However, the treatment doled out to the Burrell trustees had led him to change his mind and bequeath it to the Hunterian Museum.

In a related development, a meeting called at the weekend in Glasgow Art Club by Janey Buchan, the former MEP, expressed its outrage that the city had overturned Sir William's will.

The meeting, attended by a wide cross-section of the city, agreed to write to Mr Dewar to ask him to take action. ''We are looking to Donald Dewar to retrieve a morality for Glasgow,'' Mrs Buchan said.

Last night, Ms Liz Cameron, acting chairman of the arts and culture committee, said: ''The council took this case to the parliamentary commission because it felt it had a good strong case and it was ready to abide by the decision no matter which way it went.

''I'm only sorry that other people don't share our faith and are not willing to abide by the commissioners' judgment.''

It is the second time this year that the Maxwell Macdonalds have come up against the city. In February they accused Glasgow of reneging on the deal that enabled the city to provide the setting for Burrell Collection.

Pollok Park was donated in 1967 by Mrs Anne Maxwell Macdonald, with few provisos. One was that Pollok House should be maintained in good order along with its own art collection and that the house and grounds should always be available to the citizens of Glasgow.

Mr Maxwell Macdonald accused the authorities of acting in bad faith, and said his mother was also distressed.

Mr Maxwell Macdonald said the ''running down'' of Pollok was not what had been envisaged when the gift was made and was a source of great sadness to his family.

Pollok House was closed to the public for a period of renovation in 1995. It was opened again for just three months in the autumn of last year, and then closed again.

Following a period of renovation of Pollok House, it had remained more often shut than open and its art collection had been dispersed, no doubt for security reasons, said Mr Macdonald.

His complaint was that the citizens of Glasgow, and academics, were being denied entry to a building of historic importance.

With the museums and art galleries department facing a new cut of #1.1m, the family is likely to be drawn into further conflict with the council which is looking at closing Pollok House for a year.