Hi Russ,
For a while I thought it may have been the same pilot whose 'Pup' was knocked down by Osterroth on 12th April marked with an 'M'---from memory.
But of course when I checked it out --Mack was made prisoner at that time---and could'nt of been around later (in any Squadron)
Funny how that photo. of Macks 'Pup' came to mind straight away though
Dave. P.S. Do you 'see' the Ruston, Proctor trademark--or is it just me?