‘You know as wel as I do the whole of my life’s spread out for you to pick over,’ Dallas said. ‘Don’t be so damned suspicious.’

The car skidded to a standstill.

‘This is it,’ the driver said.

Dallas and Olin got out. The three other police cars emptied. The prowl boys stood around in the rain expectantly, looking at Olin for orders.

‘Where did you hear the shot?’ Olin asked.

‘Right here. It seemed to come from those buildings.’ Dal as waved at the high, dark warehouses.

‘Okay, boys,’ Olin said. ‘Get busy. Look these joints over. If you find anything, sound your whistles.’

The prowl boys broke up into parties of twos and began a systematic search of the warehouses.

‘I’m going to the waterfront,’ Dal as said. ‘Coming?’

‘Leave it to the River Police,’ Olin said shortly. ‘I tipped them off before I left.’