/usr/include/quickfix/fix42/ is in libquickfix-dev 1.14.4+dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/quickfix/fix42/Advertisement.h
/usr/include/quickfix/fix42/Allocation.h
/usr/include/quickfix/fix42/AllocationInstructionAck.h
/usr/include/quickfix/fix42/BidRequest.h
/usr/include/quickfix/fix42/BidResponse.h
/usr/include/quickfix/fix42/BusinessMessageReject.h
/usr/include/quickfix/fix42/DontKnowTrade.h
/usr/include/quickfix/fix42/Email.h
/usr/include/quickfix/fix42/ExecutionReport.h
/usr/include/quickfix/fix42/Heartbeat.h
/usr/include/quickfix/fix42/IOI.h
/usr/include/quickfix/fix42/ListCancelRequest.h
/usr/include/quickfix/fix42/ListExecute.h
/usr/include/quickfix/fix42/ListStatus.h
/usr/include/quickfix/fix42/ListStatusRequest.h
/usr/include/quickfix/fix42/ListStrikePrice.h
/usr/include/quickfix/fix42/Logon.h
/usr/include/quickfix/fix42/Logout.h
/usr/include/quickfix/fix42/MarketDataIncrementalRefresh.h
/usr/include/quickfix/fix42/MarketDataRequest.h
/usr/include/quickfix/fix42/MarketDataRequestReject.h
/usr/include/quickfix/fix42/MarketDataSnapshotFullRefresh.h
/usr/include/quickfix/fix42/MassQuote.h
/usr/include/quickfix/fix42/Message.h
/usr/include/quickfix/fix42/MessageCracker.h
/usr/include/quickfix/fix42/NewOrderList.h
/usr/include/quickfix/fix42/NewOrderSingle.h
/usr/include/quickfix/fix42/News.h
/usr/include/quickfix/fix42/OrderCancelReject.h
/usr/include/quickfix/fix42/OrderCancelReplaceRequest.h
/usr/include/quickfix/fix42/OrderCancelRequest.h
/usr/include/quickfix/fix42/OrderStatusRequest.h
/usr/include/quickfix/fix42/Quote.h
/usr/include/quickfix/fix42/QuoteAcknowledgement.h
/usr/include/quickfix/fix42/QuoteCancel.h
/usr/include/quickfix/fix42/QuoteRequest.h
/usr/include/quickfix/fix42/QuoteStatusRequest.h
/usr/include/quickfix/fix42/Reject.h
/usr/include/quickfix/fix42/ResendRequest.h
/usr/include/quickfix/fix42/SecurityDefinition.h
/usr/include/quickfix/fix42/SecurityDefinitionRequest.h
/usr/include/quickfix/fix42/SecurityStatus.h
/usr/include/quickfix/fix42/SecurityStatusRequest.h
/usr/include/quickfix/fix42/SequenceReset.h
/usr/include/quickfix/fix42/SettlementInstructions.h
/usr/include/quickfix/fix42/TestRequest.h
/usr/include/quickfix/fix42/TradingSessionStatus.h
/usr/include/quickfix/fix42/TradingSessionStatusRequest.h