Roughead's The Trial of Deacon Brodie says this about the Carnegie grocery store job:

The partners seem to have rested satisfied with the substantial profits of their last transaction for a considerable time, for the next robbery of which we have any details was not carried out till 16th August, 1787. In this, for the first time, they had the advantage of Ainslie's assistance, he being taken into their confidence for that end. The three repaired to Leith, to the shop of John Carnegie, a grocer at the foot of St. Andrew Street, which Ainslie and Smith entered by means of pick-locks Brodie remaining without to watch and carried off "350 pounds of fine black tea," at that period a very valuable haul. Two wallets were filled from the chests in the shop, but " Ainslie being ill at this time and Brodie being weakly," they were forced to abandon one of the wallets, which they hid in a shed in a field by the Bonnington Road, where it was afterwards recovered. The Deacon objected to the other wallet being taken to his house, and what became of it is not known.

Backing up Roughead's account is George Smith's 10 March 1788 statement to Sheriff Archibald Cockburn about the Carnegie robbery:

[George Smith] Declares that in the month of August last, as he thinks, the declarant, in company with William Brodie and Andrew Ainslie, went to a shop in Leith, which they broke into by means of two pick-lock keys, one for the padlock and another for the stock-lock ; that the declarant and Ainslie went into the shop and Brodie kept watch, to give an alarm in case of danger; that from this shop they carried off two pair of wallets full of tea, which were taken from four chests ; that Ainslie was ill at this time, and Brodie being weakly, Ainslie and he could scarcely manage one of the wallets, which obliged him to put it into an old press bed (as the declarant took it to be) which they found standing in a shed in a field adjoining to the Bonnington Road to Leith ; that it was proposed to lodge the tea in Brodie's, but he afterwards objected to it, which was the reason that they never inquired after it more.

The Edinburgh Evening Courant reported this about the Carnegie grocery store robbery:

That in the Night betwixt Thursday the 16th and Friday the 17th of August instant, the Shop of John Carnegie, Grocer, at the foot of St. Andrew's Street, Leith, was broke into, and about 350 pounds of fine black tea stolen and carried off.

Whoever will give such information to William Scott, procurator-fiscal of the County of Edinburgh, within three months from this date, as shall lead to a discovering in the premises, will receive from him a reward of Ten Guineas, on conviction of the offender or offenders and the informer's name (if required) concealed,

N.B. It is presumed the above theft has been committed by some of those who stroll the country under the pretence of hawking tea, and who may have had access to know Mr. Carnegie's shop. The tea was turned out of the packages, and yesterday several parcels of tea were observed lying at different places on the Bennington road as if dropt from a parcel, which is a farther confirmation of the above suspicion, and that the tea stolen is carried to the country for sale by some hawker. If, therefore, any considerable quantity of tea is observed in the custody of any suspicious person or persons, it is intreated they may be secured, and notice given to said William Scott, who will pay all reasonable charges, besides a reasonable gratification for trouble.