From Arup, the engineers:

Dear All,

As part of the Water of Leith Flood Prevention Scheme we are proposing to carry out trial pits at three locations along Roseburn Park Wall to determine the extents of the existing foundation.  Trial pits approximately 1m by 1m and up to 1m deep will be created on either side of the wall at the positions indicated HERE: http://goo.gl/maps/QMqW

It is proposed that the works will be carried out between 8am and 4pm commencing on the 30th July. The works should take no longer than four working days depending on weather conditions. All the excavations will be reinstated in full following completion. No footpath closures will be in place during this time. The excavations will be carried out by hand and therefore no heavy machinery will be in operation during the work.

Should inconsistencies in the wall foundations be found additional trial pits of a similar nature will be carried out along the wall within the time frame provided above.

Works will be carried out in such a way that they will not interrupt normal usage of the park.

Please let me know if you have any questions or comments regarding the works that have been described above or if the dates proposed are not suitable.