The 1941 Pool Siddur is available online. It's claimed that it's out of copyright which I believe not to be the case as it's been republished multiple times including within the last 18 years. Perhaps the publisher failed to renew the copyright. There is also a full-text download, though I can't quite make out the digital pattern. I think it's confused when it's expecting Hebrew and finds English. It was published by the OpenSourchSiddur Project.