The thief was keeping an eye on what they were doing even as he pretended to serve them faithfully. 
ðʌ θif wɑz kipɪŋ æn aɪ ɑn wʌt ðeɪ wɜ˞ duɪŋ ivɪn æz hi pɹitɛndɪd tu sɜ˞v ðɛm feɪθfʌli. 
 Indian's voice is very clear and very close-sounding, suggesting a high-quality recording. The tone of his speech is very monotone, with a steady and consistent pitch throughout. There is no noticeable background noise or reverberation in the recording.